Wiktionary
blank cheques
n. (blank cheque English)
Usage examples of "blank cheques".
I soon discovered, or rather the police discovered that he had stolen a lot of my office note-paper of which he had made free use, and when arrested on another charge several blank cheques which had been abstracted from my cheque book were found upon him.
And until you do, I'm not going to be signing any blank cheques, Korath.