unconditional authority; full discretionary power.

a sheet of paper that is blank except for a signature and given by the signer to another person to write in what he or she pleases.

Cards . a hand having no face card but with a special scoring value, as in piquet.

noun

blank check , franchise , free hand , free rein , freedom , full authority , full power , authority , grant , latitude , leeway , license , no holds barred , permission , power of attorney , prerogative , sanction , say , say-so , unconditional authority , unconditional right , unrestricted authority , warrant