The term "uk defacto visa" typically refers to a visa category that allows unmarried partners to live together in the United Kingdom. To qualify for a defacto visa, couples must prove that they have been living together in a committed relationship akin to marriage for a certain period. Documentation such as joint financial records, shared responsibilities, and proof of cohabitation is usually required. It's essential to meet the specific criteria outlined by the UK Home Office for this type of visa.