I think that previous payments are only saved if you tell it to do so, Bob. Also on my water bill the payment code changes with every bill, unlike ΔΕΗ and COSMOTE that stay the same so a previous number may not help.
With things like that (utility bills on-line) I probably did tell the bank to keep a note. With my frequently addled brain it would have seemed like a good idea at the time!. As to water bills, never had that problem because Apokoronas only accept cash payments, in person at either Vrysses or Vamos. Bob.
Yesterday today was tomorrow. Don't dilly dally!