CARTE BLANCHE - Unlimited authority--granted
by one person to another--to impose conditions which
will be binding upon the person granting such authority.
The signature of an individual or more, on a white
paper, with a sufficient space left above it to write
a note or other writing.
In the course of business, it not unfrequently occurs
that for the sake of convenience, signatures in blank
are given with authority to fill them up.. These are
binding upon the parties. But the blank must be filled
up by the very person authorized.