Iirc, with our current partner bank Evolve + technology provider Synapse, ACHs and wires have “Synapse” as the sender name on a certain field, instead of your business name.

This is (as far as I understand) wrong. Fortunately it usually doesn’t break anything, but Circle is more strict about this saying the business name.

We have a new partner bank we just launched where we have full control of the ACH stack, where we’ve resolved this. Also trying to fix the issue with the existing partner.

Caveat that I didn’t check this answer with anyone, since it’s early.