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English definition of “certified copy”

certified copy

noun [C]     (plural certified copies) (also attested copy)
a copy of a document that can be used instead of the original one because an official has checked it and formally approved it as a true and accurate copy by signing it: To open an account, some banks demand a certified copy of your passport and proof of address.
(Definition of certified copy noun from the Cambridge Business English Dictionary © Cambridge University Press)
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