The proof of cohabitation/de facto marriage relationship is a document used to prove the relationship between the applicant and his/her cohabiting partner or de facto spouse. This material is usually required for immigration, visa or other procedures related to going abroad or relocation. It can prove that the applicant and his/her cohabiting partner or de facto spouse have a stable and substantial cohabitation relationship and may have an impact on the applicant's application. For example, in a visa application, you may need to provide this certificate to prove the relationship with your cohabiting partner or de facto spouse in order to obtain the relevant visa or residence rights.