Two routes that often run together
In New York, payments under many orders run through the state's child support program, whose collection unit can use administrative tools such as income withholding and tax refund intercepts. Separately, the parent who is owed support can file a violation petition in Family Court, where a support magistrate can enter judgments for arrears and refer the case for further action when nonpayment appears willful. The agency route and the court route are not mutually exclusive. Large arrears can also trigger federal consequences, including denial of a passport. In most cases enforcement is available whether the order came from Family Court or from a divorce judgment.
Proving what was and was not paid
Enforcement depends on a clean payment history. Get the account statement from the support program if payments run through it. If any payments were made directly between parents, gather proof of them, because direct payments may not appear in the agency's records. Bring the order itself, any later modifications, and what you know about the other parent's current employer or income sources. If the paying parent lives in another state, interstate enforcement is available, though the logistics differ.
If you are the parent who owes
Many people searching this topic are on the paying side. Accrued arrears generally cannot be reduced retroactively, so a parent whose income has dropped should ask for a modification promptly rather than wait for an enforcement case to arrive. When we first talk, we look at which side you are on, how much is claimed, whether the account balance is accurate, and whether a modification request or a payment arrangement belongs in the conversation. Ignoring court dates in an enforcement case tends to make every option narrower. A parent who could not pay because of a genuine inability, such as a disabling injury, should bring proof of it, because willfulness is often the central question.