Ud over disse to typer partnerskab, hvor parterne har valgt at være officielt registreret, er der også et begrænset antal samlivsforhold, som ikke anerkendes af nogen medlemsstat, da de involverede parter har valgt ikke at udnytte muligheden for juridisk anerkendelse.
In addition to these two categories of partnerships, where the partners have chosen to be officially registered, there are also a limited number of cohabiting partnerships that are not recognised by any Member State since the people involved have chosen not to seek the legal recognition open to them.