Hi I'd be applying for my visa soon and i watched a YouTube video that said that my sponsor can be my sister and if she has a done a change of name then I will have to provide documents for that.

My sister is my sponsor and she is not married but she has a different surname from mine. Like she is answering our grandfather's name while I'm answering my father's name.

My question is, would i have to show any documents to prove that she's my sister. The different surnames is showing on our birthday certificates

Please help!!