Under New York contract law, entities can seek judicial approval of contracts entered into with minors. Learn about rules governing a contract with a minor.A minor may disaffirm a contract at any time during minority or upon reaching majority. Under New York State law, generally you must be at least eighteen (18) years of age to enter into a contract, unless a parent or legal guardian signs as well. To start a case for money, the plaintiff fills out forms called a Summons and a Complaint, or a Summons with Notice. How the Law Defines Breach of Contract. Please fill out this field. Step 1: Fill out the Petition. What happens if a minor signs a contract? As part of this year's celebration, Graceland in Memphis is hosting several days of events honoring the King of Rock 'n' Roll.