Hey, @gizmo thank you for your reply, I indeed checked. As I said the account affected here is a local business, they make like 1.1K MRR from the same people forever. I've checked personally the disputes and they are all due to these "insufficient funds", also one issue that happened like 3 weeks ago on the same account was that Stripe was incorrectly crafting the SEPA Mandate and for the reason the bank rejected it.

It seems like their own mistake has caused their automatic fraud detection algorithm to incorrectly flag this account. This is speculation obviously, but with this timing...