Execute
(..); to sign; (...)
(...)
2) to sign and otherwise complete a document, such as acknowledging the signature if required to make the document valid.

https://legal-dictionary.thefreedictionary.com/execute

deliver
v. to actually hand an object, money or document to another.
https://legal-dictionary.thefreedictionary.com/deliver

“Execute and Deliver”

Posted on January 8, 2007 by Ken Adams

I’ve never been fond of the phrase execute and deliver, so this weekend I took the opportunity to revisit it. My conclusions are modest enough. Here they are, in case anyone’s interested.

This phrase execute and deliver (and its counterpart execution and delivery) is a standard feature of English-language contracts. As in the following obligation: The Borrower shall from time to time execute and deliver to the Bank, at the request of the Bank, all Financing Statements and other documents that the Bank requests. And as in the following representation: This agreement and the New Warrants have been duly executed and delivered by the Company. It follows that an opinion regarding execution and delivery is a standard element of legal opinions.

The meaning of execute is straightforward enough: a contract has been executed when it has been signed in the name of the party by someone who has authority to act on the party’s behalf. See Glazer and Fitzgibbon on Legal Opinions § 9.4 (2d ed. 2001).

I’m more interested in deliver. Fitzgibbon and Glazer § 9.5 says as follows:

The “duly delivered” portion of the opinion requires that the company, having duly authorized and executed the agreement, transfer possession of the agreement in a manner that under applicable law is sufficient to bring the agreement into effect as a binding obligation of the company. Normally, the company does this by physically delivering a signed copy of the agreement to a representative of the other party.

https://www.adamsdrafting.com/execute-and-deliver/