Eagle's dual and tiered pricing is compliant from the point of sale through back-end processing, statementing, and merchant payout. Not just at the surface.
The industry's dirty secret is that not every processor is compliant on the back end. Rates get quietly manipulated where the merchant can't see.
If your processor charges 4.00% at the point of sale and settles 3.864% on the back end, that gap is your merchant's liability.
Credits and chargebacks are where the wheels fall off. Most processors can't tell you exactly how they handle them. That's the problem.

Eagle's pricing programs are compliant the whole way through: point of sale, back-end processing, statementing, and payment to the merchant. Because Eagle owns the back end, the way credits and chargebacks are handled is transparent and correct, not massaged behind the scenes.
If you can't say for certain how your current processor treats dual pricing on credits and chargebacks, that's the conversation to have. Eagle can show you, transaction by transaction.
Eagle supports any variation of dual or tiered pricing your merchants need. The math is the same on the front end and the back end.
Front-end rate matches back-end settlement. Statements match the math. Merchant payout is correct.
Returns and disputes treated correctly, not adjusted behind the scenes to protect a margin.
Eagle wrote the back end. The math is auditable because the system is ours.
Eagle supports the structure that fits the merchant, not just the structure that fits the platform.