Kollokation
They usually sign off in the same way, no matter what we tell them.
"You can thank your brother for me and sign off."
I signed off and turned back to my own watch team.
They signed off, and the six men in the room looked at each other.
Only last month, he signed off on another big tax cut.
Again you will be asked to sign off each stage.
"Everybody knows what needs to be done; the question is will she sign off on it."
He was about to sign off when the study door opened.
It was late, so I got ready to sign off.
And, often as not, their companies sign off on the deal.
Phrasal Verbs