blank check
noun
a bank check bearing a signature but no stated amount.
unrestricted authority; a free hand: He was given a blank check in the choice of personnel for the new department.
Origin of blank check
First recorded in 1885–90
Words nearby blank check
blandish,
blandishment,
blandishments,
blank,
blank cartridge,
blank check,
blank cheque,
blank endorsement,
blank shell,
blank slate,
blank tape
Idioms and Phrases with blank check
blank check
Unrestricted authority, a free hand, as in I'll support most of the chairman's agenda, but I'm not ready to give him a blank check for the company's future. Literally this term signifies a bank check that is signed by the drawer but does not indicate the amount of money, which is filled in by the person to whom it is given. [Late 1800s]