In most cases, you need to include a marriage certificate to prove your parents’ or grandparents’ relationship. There are a few exceptions:
If one parent is deceased
You should include a letter explaining the situation. In the case of a deceased parent, you would include their death certificate.
If your parents don’t have a marriage certificate
If you can’t get one, include a detailed explanation as to why you can’t.
If your parents divorced some time ago and you don’t know where the parent you’re not sponsoring is
If your parents are divorced, you can include a notarized divorce certificate to prove one parent is not a dependant of the other. A processing officer may ask you for more information later.
Including all the documents we ask for will help make sure your application isn’t
delayed in processing or
returned to you as incomplete