Home Unclaimed Property Claim Your Property Claim Your Property! Now you can claim your property online! Or simply complete the claim form and submit via USPS. See instructions below: Complete the information requested on the claim form found here: COT ST912 claim form (PDF). Follow specific instructions for individuals, businesses/organizations, deceased/estates, on behalf of another person, or joint accounts/multiple owners included on the claim form. Sign the form & attach the supporting documentation listed. Mail or email to the address located on the top of your claim form. Do you still have questions? Contact Us: In Maryland: 410-767-1700 Toll Free: 800-782-7383 unclaim@marylandtaxes.gov