Every person who wants to have credit, to make a big purchase, or to board a 747 has to have a list of 10 friends - people who can vouch for their identity and know how to test it if needed.
Eyewitnesses vouch for the fact that they stayed to help the children escape but bolted from the scene when public anger turned against them.
I can personally vouch that he's a man of high moral integrity, and knows a worthy cause when he sees one.
The area is intended for VIPs and guests of MPs and Peers who are supposed to vouch personally for those who receive their tickets.
After spending an afternoon with him, I can vouch for the fact that his sense of humour is razor-sharp.
he was refused entrance until someone could vouch for him
The investment bank is required to vouch for the fact that the stock is priced below its expected value in the market.
I can vouch for the truth of much of his statement, and believe it to be wholly as stated, in every particular.
The Professor can't vouch for any of this information, but any observer of Fairfax will conclude that it all sounds entirely likely.
the explosive used is of my own formulation, and I can vouch for its efficiency