Certified documents if you are overseas
If a person is not in the United Kingdom at the time the document must be provided, a copy of the document may be certified as a true copy by:
● a United Kingdom embassy, High Commission, or consulate (other than a consulate headed by an honorary consul); or
● a competent authority under the Convention Abolishing the Requirement of Legalisation for Foreign Public Documents, done at The Hague on 5 October 1961.