Has anyone successful used this to swap old stamps without barcodes for new ones?
A fortnight ago I sent back more than 60 second class stamps left over from marketing mailshots when I was self-employed some years ago. I followed the guidance, put everything in a Freepost envelope and sent them off. I've heard nothing. I don't want to have to go and buy new stamps for Christmas cards when I should have more than 60 replacements due!
How long did it take the Royal Mail to swap yours?