Learn About Delinquency Procedures Learn about delinquency procedures on a residential unit at Columbia University. Expand all Collapse all Details 1 About Delinquency Procedures All billing statements will read that rent is due on the first of the month. Please note that payments received after the 10th of the month may not be reflected on the next billing statement. Failure to make rent payments will result in collection efforts via e-mail and letter. If necessary, legal action may be taken as provided by law. Questions regarding billing should be addressed to Real Estate Billing and Accounting at 212-854-1009 or by email at [email protected]. Still have questions? Visit our Service Center.