If your ACRO Police Certificate has been signed by an official of the issuing authority, an apostille can be affixed to the document by the Foreign, Commonwealth and Development Office directly. There is no requirement for notarisation. The signature on the document must be a wet ink signature however. If you require your ACRO Police Certificate to be legalised with apostille but it does not contain a signature from an official from the issuing authority, it will need to be certified by a notary. This is the same case, if you have a printout, digital scan, or photocopy of your certificate. The Notary must have a valid practising certificate, and must sign the document in the United Kingdom. The notary must also state the action they have taken i.e. if they have witnessed the official signature, confirmed it as an original document, or certified it as a copy. The notary must subscribe their personal signature to the document, and also include their full name and address as well as the date of notarisation.