on somebody's say-so

on (one's) say-so

With or according to one's authorization or permission. Although I'm the manager of this department, I can only make changes to the way things run on the general manager's say-so. A: "We're going to start transferring the funds into the new account." B: "On whose say-so?"
See also: on
Farlex Dictionary of Idioms.

on somebody’s ˈsay-so

based on a statement that somebody makes without giving any proof: He hired and fired people on his partner’s say-so.
See also: on
Farlex Partner Idioms Dictionary
See also:
  • on (one's) say-so
  • on one's say-so
  • on say-so
  • be on (one's) say-so
  • be on the say-so of (someone)
  • on the say-so of (someone)
  • at (one's) doorstep
  • at doorstep
  • at one's door
  • at door