A. The best way to contact the London Federal Benefits Unit is via email at FBU.London@ssa.gov . You will receive a reply within 3 business days.
B. You can write to the London Federal Benefits Unit at the following address:
U.S. Embassy
Federal Benefits Unit
Box 0005
24 Grosvenor Square
London W1A 2LQ
C. If necessary you can visit the London Federal Benefits Unit Monday through Friday between the hours of 9:30 a.m. and 1:00 p.m. at the U.S. Embassy, 24 Grosvenor Square, London W1A 2LQ. No appointment is necessary to visit the London Federal Benefits Unit. See Security - How To Get Into The Embassy for further information concerning access to the U.S. Embassy.
D. You can call the London Federal Benefits Unit Monday through Friday between the hours 8:30am and 1:00pm at 020-7499-9000.
To ensure secure delivery and return, all original documents should be mailed to the Federal Benefits Unit via Special Delivery from the Royal Mail. A return self-addressed Special Delivery envelope must be provided. The London Federal Benefits Unit mailing address is as follows:
U.S. Embassy
Federal Benefits Unit
Box 0005
24 Grosvenor Square
London W1A 2LQ
Contacting the London Federal Benefits Unit