hello, i am planning to apply for a visit visa. my sister is a PR card holder of Canada. she has sent me a letter addressed to the immigration officer mentioning our relationship, purpose of visit, bank balance etc which I will submit along with my application. I have also prepared a cover letter from my side to the immigration officer. My question is, do I need another letter addressed to me by my sister inviting me to visit her? Or, the letter addressed to the immigration Officer from my sister suffficient?