If you are applying for a bank account, a mortgage or similar things you may be asked by the company to provide documents that have been certified as true copies of the original.
Ask a professional person ‘of good standing’, such as a solicitor, to certify a document as a true copy of an original.
Documents that can be copied and certified include:
letters from a hospital/doctor
letters from a government department
photocard driving licences
gas, electricity or council tax bills
bank/building society or credit card statements