There are several documents needed for Spouse Visa. The exact documents will depend on the nationality of the spouse and the nation of residence. Passport copy, Birth certificate, proof of relationship, police reports, etc will be needed.
The fundamental documents required are:
Wedding certificate Photographs of passport size Valid Passport Photographs demonstrating the authenticity of a relationship like family photographs etc Joint housing bills Joint statements of bank account Any other requirements as specified by the Immigration authorities
Apart from this in some countries it is required that the primary applicant and the spouse must be above 18 years of age. A birth certificate will be required to prove this.
The primary applicant must have proof in the form of bank statements that he has the necessary funds to support his spouse and other dependents.