Contact ADEA DHCAS
ADEA DHCAS Customer Support Representatives are available Monday through Friday, 9:00 a.m. 5:00 p.m. Eastern Time except federal holidays.
By USPS, use the P.O. Box address below:
ADEA DHCAS Processing Department
PO Box 9129
Watertown, MA 02471 USA
Note: USPS (United States Postal Service) Delivery Confirmation does NOT verify receipt of materials at ADEA DHCAS