There is no requirement that either party must change their surname upon entering a civil partnership. However, many couples wish to follow marital traditions and seek to change their surname to that of either partner, or combine their names to make a double-barrelled surname. This change can be made after the civil partnership is registered, and authorities will accept a certificate of civil partnership as evidence of name change, e.g. when applying for a passport or a driving licence. In Scotland, names need not be changed to be considered valid (deeds poll do not exist under Scots law), though some English-based companies may still ask for proof from an official such as a Justice of the Peace. Civil partners of male peers or knights do not receive a courtesy title to which the spouse of a peer or knight would be entitled.