Not sure if you are asking about Negotiations or Auctions. Here's a clarification for both:
- Negotiation offers: tokens are returned if the owner rejects your offer or doesn't consider it in 24h
- Auctions in this special event: tokens are returned if you don't get the player, at the end of the auction
On both cases, if the team selling the player is playing a match, tokens will be returned when this match finishes. This also applies on an auction if the team winning it is playing a match.