Submitting Additional Documents
If you have been advised that additional documentation is required in order to continue the processing of your passport or citizenship application you must submit these through the courier service, DX.
DX is a private courier agency contracted by the U.S. Embassy London to provide courier services on behalf of the Consular Section.
The Embassy cannot assume any responsibility for the efficiency, integrity or reliability of DX. The service provided is solely a matter between the customer and DX.
DX will collect your documents and deliver them to the Embassy. Your documents will be returned to you once processing of your application has been completed. Detailed information on DX services and booking is available from their website, or by calling 0844-770-1525 (calls cost 7 pence per minute plus your phone company’s access charge).