How to obtain a police certificate for the United Kingdom
Immigrant visa applicants, who have resided in the United Kingdom for 6 months or more since the age of 16, are required to obtain a police certificate from the Association of Chief Police Officers (ACPO). Further information is available from their website at http://www.acpo.police.uk/certificates.asp.
This police certificate will serve to advise the U.S. Embassy, London whether or not any criminal conviction is held against him/her.
The police certificate will be sent to the address provided at the time of application. Please note that the Immigrant Visa Unit considers the police certificate valid for 12 months from the date of issuance, not six months as stated on the certificate.