You will need to call GEICO customer service at 800-861-8380.
Instruct their customer service representative to add this information ” SUITE 240-XXXX” in the “NAME/STREET OVERFLOW” field.
Note: XXXX is your assigned mailbox number.
The layout should read exactly like this:
YOUR FULL NAME
2028 E BEN WHITE BLVD
AUSTIN TX 78741-6931
Hope you’ll find this useful!