One party must make an offer and the other party must accept it. Contracts for debt collection: A promise to answer for someone else's debt or default must be in writing to be enforceable in California.Section 1147 says that a verbal gift is generally unenforceable unless the means of obtaining possession and control of the thing are given. In contract law, an illusory promise is one that courts will not enforce. This is in contrast with a contract, which is a promise that courts will enforce. For a written contract, you generally must file your lawsuit within 4 years of when the agreement is broken. Our Los Angeles contract lawyers provide contractual legal services. You will not find a more competent and dedicated Los Angeles contract lawyer in the state of CA. Call 310.777. 0231 free legal consultation. Parties must have the "legal ability" to engage in a contractual agreement in order to form a legitimate and enforceable contract.