Blank cheque

Metaphor for a vague agreement

A blank cheque or blank check in the literal sense is a cheque that has no monetary value written in, but is already signed. In the figurative sense, it is used to describe a situation in which an agreement has been made that is open-ended or vague, and therefore subject to abuse, or in which a party is willing to consider any expense in the pursuance of their goals. The term carte blanche is used in a similar way.

This keyword could refer to multiple things. Here are some suggestions: