Payments for services are due when invoices are rendered, and monthly invoices may be submitted as work progresses and expenses, if any, are incurred. Invoices are considered past due if not paid within 30 days of the invoice date. If no attempt is made to bring the account current then past due invoices may be subject to collection proceedings. In the event we stop work or withdraw from an engagement as a result of failure to pay on a timely basis for services rendered, we shall not be liable for any damages that occur as a result of our cessation of services. At our discretion, final work product will not be released until payment is made in full (mandatory for new clients, up to three years). Payments for services are non-refundable.