on a handshake

on a handshake

Of an agreement, informally or unofficially, as opposed to officially, in writing, etc. They agreed to giving me a pay raise on a handshake, but six months later I have yet to see a dime of that. Investigating the shady deals has been difficult as many were done on a handshake, so there is very little in the way of a paper trail to follow.
See also: handshake, on

on a handshake

If an agreement or contract is made on a handshake, it is agreed between people but not written down. Our business is all done on a handshake. The White Star line, it seems, went about its business in a curious way, with contracts agreed on a handshake.
See also: handshake, on