No. Oral contracts can be valid and enforceable. The law does require that certain contracts must be in writing in order to be enforceable.
Some examples of contracts that must be in writing include those lasting more than one year, involving the sale of real estate, guaranteeing the debt of another, for the sale of goods costing more than $500, and prenuptial agreements.
Attorney at Law
Blado Kiger Bolan, Tacoma, Wash.