If I send you a token, you should swap it with the mint for a fresh token, as I might have given you a token that has already been spent

So then there are fees to be paid for that swap

(Unless I misunderstood you, nostr:npub15g937gaqdn88rxml9r9kkan8yc2lwqflqszqyuj8yn3mzkmrd57q8sfanp)