How long does a reference letter from the bank valid for Canadian visa application after collections

[Femi_sunny]

My sister is yet to file her visa application and since collected her bank reference letter since last month.

 

[Naturgrl]

My sister is yet to file her visa application and since collected her bank reference letter since last month.

Posting under refugees so probably wrong section.

 

[foodie69]

My sister is yet to file her visa application and since collected her bank reference letter since last month.

Yeah, a typical asylum issue.