I’ve been clearing out a kitchen drawer and I’ve just found a cheque for £100 to my son which was an Xmas present- 10 years ago!!! God knows how I missed paying it to the bank - guess it’s completely useless now!
You can ask the drawer to issue a replacement cheque as the original would be out of date after 6 months (although in my banking days, an initialled alteration to the date, by the drawer, would have been acceptable).