days before its six month unofficial deadline
Oh, it’s an official deadline, it’s just rarely enforced as it relies on the person in the bank noticing the date on the cheque when you pay it in, or the person who’d written the cheque noticing that it’s come out of their account more than six months after they wrote it.
I don’t think the ‘take a photo to pay a cheque in’ apps look at the date (or, indeed, the signature) on the cheque, I could be wrong. We haven’t got one yet, much to our customers’ annoyance…