The phrase "agreement someone signed" means that someone agreed to something and put their signature on a document to confirm their agreement.
Sentences with «agreement someone signed»
For certainty, the authority to release a deposit from a brokerage trust account should be established by a separate written agreement signed by both parties. (recbc.ca)
That 10 year agreement we signed with the CB should be about up. (remonline.com)
Timing — Never give a dismissed employee less than a few days to consider a severance offer and do not accept any release or agreement signed on the spot. (toronto-employmentlawyer.com)