Each year dozens of students send us their unsolicited testimonials about how our certification training has effected their jobs, their careers and their perspective The following testimonials provide you with only a small sample of the overwhelming feedback we get from our membership.

The testimonials you see here are randomly chosen from our extensive collection. To see specific testimonials from the different regions of the world or for specific types of training events just select the category of testimonials you would like to see from the menu above.


Edgar Gutierrez - Televisora de Costa Rica  

Para iniciarse en el mundo de aseguramiento de ingresos, el curso Fundamentos de Aseguramiento de Ingresos en Telecomunicaciones, es lo recomendable. El curso completo mis expectativas. Me enseño sobre conceptos tecnicos, metodos aplicativos en la detección y el control del fraude y aseguramiento de ingresos.

Godfred Attopley - Accounts Receivable Accountant

Louis has demonstrated great knowledge and understanding of all Revenue Assurance issues during the one week training from 11-15 March 2013. He was patient, showed great humility and gave everyone the opportunity to express him/herself without any impedinents. My one week experience with Louis (GRAPA) has exposed me, not only to finance issues in RA, but also how areas such as networking and systems affect telecoms revenue. Louis showed great ability, control and command of all areas of training and, coupled with the materials for the training, I would not hestitate to recommend GRAPA to any organization that is interested in assuring their revenue lines and to promote organizational growth and build investor confidence.

Godfrey G Ngwenya - Audit Supervisor

Eye opening and informative. Re-enforces that you do not know what you do until you know!

Matlhogonolo Seabo - Assistant Billing Manager

I thought I knew what revenue recognition was until we discussed it. Next, the information was useful, relevant, and very helpful. I believe that I will be able to practice what I have learned.  This course was an eye opener. I am going to reward myself for attending. Thank You Rob.

Abdul Hakeem Abdul Razzaq - Fraud and Revenue Assurance Manager

Provided a lot of insight to a number of important areas which I had not previously considered important. Gained confidence on applying approach and practice. Was able to exchange “know how” with other RA practitioners.

Tsepo A. Chapi - Manager RA & Fraud

I found the training very insightful, enlightening and guides you how to execute revenue assurance tasks professionally based on standards and best practices. After the training, and as training continues, I already figured out which areas to focus on (most revenue affected). BIG-UPS GRAPA!!!!!    

William McDonald Spence - Business Analyst

I found the course very informative and I believe it is an essential part of any person’s training wanting to enter the telco industry. I believe that senior level management will find the course to be excellent in order to assist them in understanding their business on a higher level as well as their respective departments.

Paula Cross

Very interesting course, gave an overview of the elements within a telco business and the areas that a RA Team should focus on. The Network Topology session increased my knowledge significantly (after 15 years in Telecoms). I understand the value that a RA Team can bring a company and the professional standards that should be applied.

Bernardino M Bazar - Revenue Assurance

I liked the training; I learned a lot. When I came to the training in Cape Town I had the basics of revenue assurance, but now I am much more clear about what revenue assurance is, and I´m very proud to have taken part in the training.

Olanrewaju Yusuf - Senior Manager Revenue Assurance

This is obviously the most comprehensive and  structured Revenue Assurance training available. The instructors are deeply  knowledgeable with unique presentation styles flowing from years of experience,  focused research and global industry interactions. It has certainly validated a  lot of our current methodologies and provided direction for others. Overall,  the training has helped me put the various bits and pieces of Revenue Assurance  information in context.

Franklin F Moyo - Billing Manager

This was my first time to attend formal Revenue Assurance  training and now I see why my CEO only speaks three languages, which are  "Controls, Controls and Controls.” Without knowledge of what to control  and how to do it, then we are just a bunch of jokers. The training has closed  that gap and I will be surprised if my CEO will not be happy that we will be  speaking the same language. Of more importance is the fact that I will NOW be  able to contribute to revenue maximization.

Rizwan Abdul Hayi - Director Revenue Assurance

Class was highly interactive and I enjoyed interacting  with people in my profession and share the experiences with them. I liked the  way it was organized by the GRAPA team. I give them full marks on the wonderful  arrangements. I look forward to attending more learning from GRAPA very soon.

Anonymous - RA

We have shared more experiences during these sessions.  This training gives me another view of Revenue Assurance based on new  environments of telcos industries. I now definitely know that RA has to help  all operational departments to achieve the company purpose, that is maximizing  revenues and reducing risks and cost.

Jarot Widyatmoko - Senior Officer Revenue Assurance

Very happy that I could join this revenue assurance  foundation training. It is an excellent training for those who want to improve  their knowledge to do revenue assurance better.

Abdulkarim Ahmed Alhinai - Senior Auditor Technology Audit

I think this class is useful for the internal audit  staff because it highlights different risks in telecoms organizations and introduces  the standards for RA.

Muhammad Azhar Saeed - Assistant Chief Internal Auditor

It was a good experience and we covered almost all  aspects of the foundation course that would help for better understanding of  the assurance process.

Marinda Groenewald - Revenue Assurance Manager

This was an excellent opportunity to assess where we are and assure that we follow best practice to close any loops.  A wonderfully structured approach that reduces the need for guess work and "on the spot" decision making. This allows the RA agent to truly enable the company to maximize revenue.

Floyd Munetsi - Senior Revenue Assurance Manager

The RA Certification class was very informative, interactive and comprehensive in its coverage of all the key aspects of Telecoms Revenue Assurance.    I really enjoyed debating and discussing various scenarios and practical applications with Rob and the other participants.    I would recommend this course to any telecoms revenue, business or financial manager seeking greater insight into the revenue workings of the industry.

Neotel - South Africa

The course has actually enabled us to:    Separate politics from actual RA work and apply scientific methods in executing our duties and position ourselves in the organization as a clear and real value-add function that is seen to contribute to ROI maximization versus revenue leakage policing.     

Weddington Masawi - Senior IT Audit Manager

The class was an eye opener and will definitely be of  great value to my company and myself.

Sekola Phakoe - Coordinator: MIS

Excellent!  A great job of providing this relevant course! It was very enriching, very eye opening, and very beneficial!  Thanks & regards.

Matlhogonolo Seabo - Assistant Billing Manager

I will definitely recommend this to my colleagues! I  understand revenue assurance better. Louis made it look easy and simple to  understand the complicated course material.

Monica Nankya - Systems Audit

Well streamlined and very well delivered course.  Definitely a must attend for all Revenue Assurance staff /Internal Auditors.

Joshua Mukwaila - Internal Audit Manager

Wonderful course......made me understand the telecoms  business better! I would definitely recommend it for any auditor, fraud  practitioner or revenue assurance practitioner in telecoms to take the course.

Shepherd Mwanza - Manager RA & Fraud Mgmt

It is good to finally understand Greek. This course has  provided me with a detailed insight into the operations of a Telco.

Brian Mungofa - Audit Partner

This class was excellent for people who are serious  about understanding Revenue Assurance in Telcos.

Baltazar T Ngomane - Revenue Assurance Analyst

The knowledge I received at GRAPA Academy will help me  so much in organizing and performing my RA activities better. Following the  GRAPA standards many control points will be much effective.

Bernardino Bazar - Revenue Assurance

Wonderful training course! If my company decides, I  would like to take a fraud training course. I enjoyed the course and was good  to know people who actually know what RA is.

Attie du Plessis - Junior Systems Analyst

I enjoyed the class thoroughly. I learned a LOT. The way Louis has been able to break the chaos and confusion down to understandable bite-size chunks has been great. I walk away a richer professional.

Andre Viljoen - Principal Specialist: Revenue Assurance

Although many of the items were familiar, it was good to know that we, as an RA Department, are working on the correct things and moving in the right direction. I will also be taking away a number of new things that we can look at and perform and change the way we look at certain things. This course has definitely added value for me. I wish I had done this course years ago. It will definitely not only benefit anyone working in RA but also people working in other areas of the business.

Abel Apollo Bogatsu - Group General Manager Finance

Excellent course and a must do for finance and audit managers.

Elizabeth Connors - Quality Auditor

Louis did a tremendous job covering Telco Revenue Assurance.  He made the experience very informational.

Gilbert Soudir - Bell Canada

The course gives you a general understanding of Revenue Assurance and the responsibilities required. The topics that are covered relate to the real world business issues and help us find out the best way to approach them after understanding the concept. A great experience, I recommend for all revenue assurance agents.

Nasra Barre - Quality Auditor

Great course! Thank you so much Louis! This course gave me the chance to enhance my learning on the Revenue Assurance Practices. I hope you have the chance to visit Djibouti one day; this course will be very beneficial to them.

Giuliano Filoso - Bell Canada

I thought this course was a great learning experience.  I have been given the tools and knowledge to take my career to the next level within Revenue Assurance.

Taavi Tamkivi - Skype

The course was extremely useful in putting my practitioner's experiences into a clear theoretical model, which is scalable over different revenue streams in current and future telco and IT environments.

Kostas Perrikos

Great strategic approach with practical examples of why revenue assurance needs to lead the way in today’s telecoms world. I found this course gave real knowledge and essential guidance for Management and Revenue Assurance professionals to realize the full impact in the business strategy.

Mohammed Mohiuddin - System Analyst/Telecom Billing Services Unit

Excellent course; clearly identifies the areas to  concentrate and work on in telecom's existing and emerging technologies.

Angelica Li - Business Consultant

It's a good course for people seeking structure and  methodology in understanding RA as a domain.


This class is a    must for anyone who is involved with revenue assurance. Rob is a master of    the subject and knows how to effectively communicate his knowledge to    participants.

Anonymous (2)

This class is a must for anyone who is involved with revenue assurance. Rob is a master of the subject and knows how to effectively communicate his knowledge to participants.

Lisa Gascoigne - Vice President

It was a great class that demonstrated how critical revenue assurance is in all aspects of the business. I left with a better understanding of the controls that need to be implemented in our business.

Gary Smith - Manager RA, Fraud & IA

The course was well delivered and the material was timely and pertinent to my current revenue assurance development needs.

Ryan Lijertwood - Fraud Analyst

As always, I've taken away valuable information on Revenue Assurance and how it pertains to our market. Throughout the week, I've formed some great relationships and lifelong contacts. I look forward to the next event from GRAPA.

Mohamad Kahil - Sr. RA & Fraud Management Manager

When I decided to attend the RA Foundations course with my RA team, I thought I would only be there to coach them and that the Foundations course was not for me. Only after starting the first sessions did I realized that this course was not just refreshing our knowledge but, in addition, started to enlighten us towards some misconceptions about RA.

Nagarajan Subramaniam - RA Specialist Zain Kuwait

The training was excellent and I would strongly recommend to our management to arrange for GRAPA's Advanced Revenue Assurance training course.

Parminder Singh - Protiviti Kuwait

The old man is too good, practical and clear. I would definitely want to be in his class again on other serious revenue assurance subjects.

Hanan L Alshammari - Zain Kuwait

The course has definitely benefited me, especially since I'm very new to the revenue assurance industry. The course was well structured and flowed well, but 40 hours is not enough time to take in the large amount of information. However, this provided a good picture or direction to investigate more in certain areas. Controls were my priority for each stream.

Abdullah J Al-Khateeb - Revenue Assurance Analyst Zain Kuwait

This training course has greatly enhanced my knowledge in revenue assurance and it has opened my eyes on a lot of issues that I did not know existed. Also, this course helped me in improving the methods I use to resolve revenue assurance issues.

Irfan M Shaikh - Senior Consultant Protiviti Kuwait

The training is a must for all telecoms professionals or those aspiring to be in the revenue assurance business. Rob is an amazing teacher. He makes all his classes extremely interesting with his vast industry experience and exposure to telecoms worldwide. The GRAPA people are doing a great job and I wish them all the best.

Raghwendra Agarwalm - Manager Protiviti Kuwait

The training course provides the basic, as well as technical, knowledge which is required and a must for people involved in revenue assurance.

Abdullah M Al-Qabandi - Revenue Assurance Manager Zain Kuwait

The course was very comprehensive and practical. It did provide a good level of information to better control the RA function. I highly recommend this course to anyone involved with assuring revenue or operations.

Mushtaq Talib Khalil - Zain Iraq

I found good information in this course and I learned some materials that will improve my skills. Also, the teacher, Louis, was very interactive, flexible and engaging for us. So many thanks to Louis and GRAPA.

Ahmed Najim Abdullah - Zain Iraq

I received good knowledge in this course, which will    help me and support me in my job. I enjoyed this course very much, especially with the materials contents and the way the instructor treated it to make the    participants focus on the course. So, in general, this course was very enjoyable and it is very important for all telco employees.

Crismar Quintana - Consultant  

Telecommunications is a very dynamic sector, therefore there is not enough experience. The interaction with other professionals is the key to growth and it complements all the knowledge acquired. Having the opportunity to learn from the best has exceeded my expectations in this training. I'm anxious to start putting into practice everything I learned.

Yassin Mohammed Safianu - Accounts Receivable Accountant

As a revenue assurance analyst, I feel more empowered to do the right things that will benefit any firm I find myself with. Additionally, the training is right on point, insightful and empowering. I recommend this to all serious business owners.

Ebenezer Frimpong - Senior Auditor

The course has been a wonderful experience. It has unlocked all the hitherto mysteries of telecoms which I am most certain will greatly enhance my work delivery.

Lynden Gittens - Revenue Assurance Sr. Analyst

I thought the class really added value for me as a Revenue Assurance Professional.      

Erle E. Smith - Regional Revenue Assurance Manager

This is the most comprehensive training course on telecomminication generally and Revenue Assurance specifically that I have ever attended. The GRAPA trainer (Louis) had intimate knowledge of the material and presented it in a clear and simple manner.

Jose Rodrigo Sandoval Lanza - Revenue Assurance and Fraud Manager

I really enjoyed the class. It covers vast material and it is very well organized. The class helped us to realize we are already doing much of the Revenue Assurance controls and showed us how to stick to the standards in order to do the work in a professional way.      

Gustavo E. Vega - Risk Manager

Definitly, GRAPA is a must for Revenue Assurance professionals. It captures most of the basic terms and ideas necessary to understand the main responsability of a professional in the field. It also clarifies how to better implement controls in order to mitigate risk of revenue loss.

Jacqueline Patricia Garrick - Regional Systems Support Officer

The course exceeded my expectations. I was very impressed that included in the end to end revenue assurance process was useful technical knowledge which will be very useful in helping me to better perform my role of designing, developing and maintaining computer programs for the RA team in my company. I also found the non-technical areas to be very informative as before the course I did not have a good appreciation of much of the material covered. I now consider myself to be a rounded RA professional, thanks to GRAPA.

Miguel Angel Juarez Vargas - Jefe

Curso Fundamentos de RA muy recomendable, ya que es amplio en sus temario, practico en su imparticion y facil de entender con muchos ejemplos reales de todo el mundo.      

RA Foundation course is highly recommended since it is broad in its topics. The teaching is practical and easy to understand with many examples from around world.

Cecille D. Sinclair - RA Manager

Solid course content for the budding and seasoned RA professional. Pulls knowledge in focus to provide key direction in the development and/or entrenchment of the revenue assurance methodology within any telecoms organization.

Valeska Adriana Doria Medina - Analyst in Fraud Revenue Assurance

En primer lugar quiero agradecer por la oportunidad, las clases me parecieron muy buenas el nivel de enseñanzaes exelente y espero colaborar a mi empresa despues de todo lo que aprendi en el curso.

Firstly, I want to thank you for the opportunity, classes seemed very good to me. Teaching level is excellent and I hope to help my company after everything that I learned in the course.

Mohammad Momeni - Accounting

Revenue assurance is new to us and we learned much. Everything about the course was very good.

Behzad Tourani - RA Finance

This course was very good for my company.

Saeidreza Hakimian - RA Analyst

Revenue assurance is a new experience in my job.  In this course, I learned many excellent technical things. I hope that I get more experience in this subject and increase my ability in my job. Thanks and best regard to Rob and GRAPA.

Nazhin Sonee - System Analyst

The class was excellent and very useful. All my questions about RA were answered in the covered subjects and I plan to use them in my job.

Mahshid Tabibzadeh Dezfuli

I am really satisfied with this course and the valuable experience I gained during this class is unparalelled.  Attending this training course is highly advisable for those active and alert people who are looking forward to improve their quality and skills in the realm of revenue assurance and fraud management. 
Hope to grab a golden opportunity to be keep in touch with the GRAPA association.

Sima Taghavi - RA Project Manager

This class was great! It was customized for us as well and now, 9 months after setting up the RA function, I finally know how to start revenue assurance in our company. My attitude towards RA & FM is changed by this training. I hope I will be able to particiipate in another GRAPA training event in the future.

Rozita Ahmadi - Process Analyst

I got a great deal from the course and it changed my atittude. The method of teaching was very lively.

Mohammadreza Shokraei Rad - RA Manager

The course was very useful. I learned so many technical things and I will use them all.  I thank Rob for teaching me all I need, and thank you GRAPA.

Alireza Azadi - Project Manager

The class was excellent and Mr. Rob Mattison was very serious and professional about the course.

Wouter J. Jobse - Advisor

The training gave me, in a short timeframe, a good insight in the the telco's infrastructure, processes and financial controls. It helps in identifying financial risks and defining appropriate controls to mitigate these risks.

Silvia Nunez Patino - Core Network Engineer

I found the course very useful to have a global overview of the billing cycle in telecom industry and now I am able to understand the point of view of my Revenue Assurance colleagues in the company. I am aware now of the importance of performing controls in the Mediation system, as it is a key point in the billing flow.It was very interesting to know the problems that the rest of my class colleagues have faced, because they might appear in my environment in the future.

Ramon J. Badloe - Business Consultant

I have 12 years experience in Revenue Assurance. We are only on day 4 and, until now, the training still exceeds my expectation of the RA foundation training. I enjoyed organizing this training for both Premium and KPN and experienced the intake for this training as very professional. As of last year April I joined Premium Business Consultants and I am sure I will apply the gained knowledge in upcoming projects. By the way, the trainers are very professional and passionate. This is exactly what I like!

Marco Kempenk - Sales Manager

After working for years in the telecom industry, this course gave me detailed insight in all the financial revenue streams within a telco. Revenue streams in all possible ways, how to determine a revenue stream, how to develop controls and set thresholds on them. The monitoring afterwards and the continuous attention on revenue assurance and the way to promote the relevance of Revenue Assurance in an organization.

Gertjan Verhoef

Course provides excellent overview of "real-time Telecoms" processes, techniques, developments and control measures for preventing revenue leakage.

Frank Beverdam - ICT Consultant

A very interesting course which gave me a broader view of all revenue streams and the risks related to these streams, especially the (radio) network streams. It was all told by a very capable instructor who managed to support the theory with examples/anecdotes from practice (which means Telco operators from all over the world). Maybe some examples could be extended with more concrete numbers. Overall conclusion: it was certainly worthwhile to attend this course.

Arjan Bakker - Consultant Billing

The financial assurance foundation gave a good insight in the revenue streams from switch to invoice and the boxes these streams use to move from switch to invoice. Together with the standard controls and best way to implement them we are ready to optimize our set of controls. Now it is up to us.

Aris Prins - Managing Partner

The course provides an excellent overview of the Telecoms processes where revenue is generated and where risks are present for potential revenue loss or fraud. It really helps to put things in perspective and to structure the diverse risks in a Telco.

Alfons Geurts, Senior Consultant

I liked the way Rob gave us a complete overview of the whole telecoms arena in a succint and energetic way. Never knew what a good horse and a Brazilian emperor had to do with the telecoms industry.

Richard Simms

The online training was exiting and informative. Better than I expected, well planned and organized. The presenters answered all questions to the best of their ability and it was very interactive.

Doug Wingeard - Revenue Assurance

The RAF class was great. There was a lot of good content and the instructor did a great job of explaining the technical concepts. This gives any RA professional a solid foundation to work from.

Ansie C Bezuidenhout - IT Audit Manager

I have realized how important it is to know your audit environment very well. Also that with telcos you need to be awake when auditing it. Very interesting and in the future when it is required of me to do such audit I will be better prepared.

Suleman Y Lockhat - Director

Very interesting course a good sense of how things come together and how the telco “ticks”. Thanks.

Russel Schafer - Revenue Assurance

The course was comprehensive and really gave me a good idea of the issues around revenue recognition in telecoms, and the controls that can be implemented in the billing environment.

Olufunmilayo Balogun - Consultant

Really appreciate the efforts of GRAPA in putting these training materials together. The training gave me a deeper knowledge of telcos and most especially in the areas of securing the network equipment. Thank you GRAPA.

Priya Amrathlall - Manager

The GRAPA training was a waterfall of knowledge. I thoroughly consumed the interactive sessions with case studies. It is an eye opener to how complex telecoms are. I would definitely like to attend more of these sessions.

Bonolo BH Moseki - IT Audit Consultant

The GRAPA training gave me essential guidance for revenue assurance, it was very practical because case studies that were used by the instructor were very detailed and I could apply them to our clients. He also demonstrated full knowledge of the subject matter.

Luvo T Mvinjwa - Manager

The 3 days of training have been very useful and informative. As an auditor this will help equip me in ensuring that I integrate the work done by IT auditors on revenue assurance. The level of detail has been well, even though at some point I got a bit lost in the terminology used.

Brian Mungofa - Audit Partner

Course content is excellent and brings one up-to-speed in understanding complexity of the network architecture to be able to understand the fundamentals of revenue recognition.

Abidemi O Adeboje - Managing Consultant

GRAPA definitely has the work experience around revenue recognition that I have ever seen. The knowledge of revenue systems, accounting and recognition is so well presented. Any revenue assurance work contemplated needs to ensure this kind of knowledge is understood before such starts. Auditors with such knowledge would be very effective in performing audit assurance process with so much ease.

Mahomed Osman

It gave me an understanding of how modern day telecoms operate and the relationship to accounting and revenue recognition and assurance.

Tendani T Mulovhedzi - Audit Supervisor

The course is very informative I have learned a lot in terms of revenue as well as the different processes involved. Learned a lot in terms of what can go wrong and how quick the industry changes and the securities involved.

Tiisetso Tsiki - Audit Clerk

I loved being involved in telecoms audit, and I have never looked at audit work that way. I have learned from this class, so because of this class I have changed the way I look and will continue to look at the audit work. This class has added so much value in my way of auditing.