Return an Unclaimed Paycheck Learn about how to return an unclaimed paycheck at Columbia University. Expand all Collapse all Details 1 About Returning Unclaimed Checks Departments should return paychecks with a note indicating the reason for which the checks are being returned. These checks should not be held in a department for more than 45 days. Checks should be addressed to Payroll Operations, Studebaker, 615 West 131stStreet, 4th Floor, New York, NY 10027. If you are seeking information about any personal unclaimed property funds, please visit the Unclaimed Property Office webpage. Still have questions? Visit our Service Center.