I'm using "settled" in the colloquial "the money has been debited from the sender's account and has been credited to the receiver's account" sense, which for th

I'm using "settled" in the colloquial "the money has been debited from the sender's account and has been credited to the receiver's account" sense, which for the purposes of this discussion is the definition that really matters. You can't just unilaterally reverse a Zelle payment any more than you can a SEPA transfer.