What type of documentation can be beneficial during the marriage interview?

Documentation that provides evidence of a couple's shared life is essential during the marriage interview. Joint documents can include things like shared bank statements, joint tax returns, lease agreements, insurance policies listing each other as beneficiaries, and photographs from shared events. These documents help establish the authenticity of the marriage and demonstrate that the couple has built a life together, which is a crucial factor in assessing the legitimacy of the relationship during the interview.

The other options fall short because focusing solely on financial documents or personal letters does not provide a comprehensive view of the couple's shared life. Additionally, relying only on verbal communication is insufficient, as immigration officials typically require tangible proof to corroborate the claims made by the couple. Hence, the correct answer emphasizes the importance of joint documentation in validating the ongoing, genuine nature of the marriage.