Can You Solve the Mystery of the Invoice Errors?
It’s no secret that card processing arrangements are complex and opaque. So, it won’t surprise you that CMSPI analysis has revealed that many merchants in the U.S. are being consistently overcharged, often by millions of dollars every year.

We’ve helped some of the largest merchants in the world conduct invoice audits and the results have been alarming – often finding seven-figure overcharges.
1 in 2 of our audits uncover material errors and some merchants are particularly vulnerable depending on the nature of their payments mix and the players in their individual payments supply chain.
Often, merchants are able to reconcile their arrangements by comparing their processing invoices to their contracts, however, this approach will only uncover certain error-types. A merchant is unable to gain visibility beyond the information provided by the payments supply chain.
We see misapplied fees on a daily basis under various guises – and, in honor of Halloween season, and to raise awareness of Phantom Fees, we’ve created CMSPI’s very own ‘whodunnit’ board game, where you and your colleagues can play detective and identify where the merchant has been mischarged.
Want to solve the mystery? Download a printable version of the game pieces and instructions here.
The Suspects
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The Weapons
Keying Errors |
Misapplied Rates |
Non-standard Transactions |
Pass-through Fees |
Phantom Fees |
Rounding-up |
Umbrella Charges |
All of these complexities make it impossible for merchants to thoroughly audit their merchant service charge. Without the necessary information, internal resource and knowledge to navigate through that information, and without the industry insight needed to accurately benchmark what fees should be applied to what transaction, many merchants will be overpaying by substantial six and seven-figure sums every year.
These overcharges aren’t necessarily lost – conducting a thorough historical invoice audit could mean large reclaims are possible. In a payments landscape where fees are ever-increasing, the payments mix is shifting quickly, and merchants face an unprecedented external challenge, merchants can’t afford to assume their invoices are error-free – start your audit today.