After 31 January 2023, regular stamps without a barcode will no longer be valid.
Royal Mail said:
‘We’re adding barcodes to our regular stamps. After 31 January 2023, regular stamps without a barcode* will no longer be valid. You can either use up these stamps before this deadline or swap them for the new barcoded ones.
‘The stamps that are changing are the stamps that will be very familiar to you.
‘They feature the profile of Her Late Majesty The Queen on a plain coloured background.
Swapping them out
Your non-barcoded stamps can be exchanged for the new barcoded version through the Stamp Swap Out scheme. To swap out your stamps, simply complete one of our Stamp Swap Out forms and send it back to us along with your non-barcoded stamps. The step-by-step process for doing this is explained below.
How to get a ‘Stamp Swap Out’ form
Source link