My father made a payment for his Chase CC using "bill pay" from his Chase checking account, somehow the payment ended up on my CC account. He called Chase (without saying anything about my account), they saw the payment debited from his checking account but not credited to his CC account, so they credited his account.
Our accounts are not linked in any way, and he never made a payment to my account, what could've happened that it ended up in my account?
BTW, the payment is still credited to my account.