Oral (sometimes called verbal) agreements are enforceable, so if you had an oral agreement that the contractor should pay a certain amount of money and it has not been paid, you could sue for compensation. Here are the issues:1) Proving the terms and conditions of the agreement: this can be difficult if it just comes down to your word vs. his (i.e. if he disagrees about what was said or agreed). Remember: if you sue him, the onus is on you to prove your case.2) Agreements are usually only prospective, not retroactive--so unless the agreement was made