City of Sydney Relationships Declaration
Other institutions such as the Registry of Births Deaths and Marriages no longer accepts an Australian Marriage Certificate as a form of ID – this creates an equal situation for both opposite sex and same sex couples as both are not allowed to present their relationship certificates as a form of ID.
Identity document
Driving licences, particularly the photocard driving licence introduced in 1998, and passports are now the most widely used ID documents in the United Kingdom, but the former cannot be used as travel documents, except within the Common Travel Area. However, driving licences from the UK and other EU countries are usually accepted within other EEA countries for identity verification. Given that passports do not fit in a typical wallet or purse, most people do not carry their passports in public without an advance that they are going to need them. For people from the UK and other countries where national ID cards are not used or not common, this leaves driving licences as the only valid form of ID to be presented, if requested by an authority for a legitimately-given reason, but unlike a travel document, they do not show the holder's nationality or immigration status. Colloquially, in day-to-day life, most authorities do not ask for identification from individuals in a sudden, spot check type manner, such as by police or security guards, although this may become a concern in instances of stop and search.