You can contact us by email, telephone, or mail.
For the Passport and Citizenship Unit, please contact us through our contact form
For the Special Consular Services unit, please contact us through our contact form, call us on  (0)20-7499-9000 and follow the prompts or fax at 020-7891-3845.
For Notarial Services please contact us through our Notarials contact form
For the Federal Benefits Unit, the most efficient way is by using our online form. You can also call us as follows:
- Callers within the UK: please call 020-7499-9000 Extensions 23926
- International callers: Please call +44-20-7499-9000 Extensions 23926
Recorded information is available 24 hours/day, seven days/week, at  (0)20-7499-9000.
You also can write to us at:
American Citizen Services
Embassy of the United States of America
33 Nine Elms Lane