It’s such a stupid system too - you receive a note saying “pay us £5 to deliver your post” with no way of knowing what they were trying to deliver - it could be something important, it could be someone sending a blank envelope just to annoy you and waste your money.
Best advice is to get some fake stamps, fill an envelope with old roof tiles, put the fake stamps and the address of someone you don’t like on the envelope and send it off
It’s such a stupid system too - you receive a note saying “pay us £5 to deliver your post” with no way of knowing what they were trying to deliver - it could be something important, it could be someone sending a blank envelope just to annoy you and waste your money.
Best advice is to get some fake stamps, fill an envelope with old roof tiles, put the fake stamps and the address of someone you don’t like on the envelope and send it off