Unused stamp on wrong envelope?

[coincidental]

Is there anything I can do about this?

I have a ton of stamps - first class with barcodes, unused - that were enthusiastically pre-stuck onto envelopes a while back but never actually used. I wanted to not waste the money and use them now but the envelopes are no good for the current cards I'm sending.

I understand cutting them out specifically to put onto the new letters is potentially not allowed but I can't find clear guidance?

[yellowbelly]

Is there anything I can do about this?

I have a ton of stamps - first class with barcodes, unused - that were enthusiastically pre-stuck onto envelopes a while back but never actually used. I wanted to not waste the money and use them now but the envelopes are no good for the current cards I'm sending.

I understand cutting them out specifically to put onto the new letters is potentially not allowed but I can't find clear guidance?

The potential problem is that RM Revenue could/would consider that a 'cut out stamp' has already been used on an envelope but has not been
cancelled, so it's being used again, potentially landing the recipient with a surcharge. We're seeing a lot more items being surcharged
coming through at the moment.

Allegedly each bar code is unique but I doubt that the RM letter sorting machine readers have enough 'brains'
to keep a record of all stamp barcodes that have or have not been used!

[SpacePhoenix]

Allegedly each bar code is unique but I doubt that the RM letter sorting machine readers have enough 'brains'
to keep a record of all stamp barcodes that have or have not been used!

The system does keep a record of the stamp barcodes that have already been through a machine