契约

He has already entered into a compact with them.

by compact

quasi contract

quitclaim deed

formal/temporary contract

legal/valid contract

void contract

written contract

blank deed

back-door contract

literal contract; written deed

contract term

transfer a deed

terminate a contract

amend a deed/contract

enter into/sign/make/conclude a contract; enter into a compact (with sb)

mortgage a deed

draw up/prepare a deed/contract

a contract/deed/charter/compact