Visitor Visa for my parents

[chkd2012]

I am applying vistior visa for my parents and younger sister. DO I need to send 3 original Bank verification letters for 3 of them? or only one bank verification letter is enough for 3 of them?

And regarding the invitation letter, should I send only one letter addressing my mother,father and sister or should I send 3 different invitation letters?

[immihelp]

Provided they are going for the interview at the same time,
1. One is enough.
2. One is enough.

[chkd2012]

Thanks for the timely reply.

I have a doubt w.r.t invitation letter to parents and letter to the consulate.

My husband is sponsering my parents and I am housewife(currently on EAD,not working). I have followed the template given in the immihelp for invitation letter and letter to the consulate

1. we have prepared the invitation letter that my husband is only inviting my parents and there is no where we have mentioned my name (eg;Dear MIL,FIL,SIL
I would like to invite you all to the USA to stay with me for 45 days. It would be very nice to have you all with me. ). Is it ok since my husband is the only sponserer or should I mention my name as well in the letter and sign with him.

2. Have the same doubt in the Letter to the consulate. we have prepared the letter that my husband is requesting us consulate to grant B2 visa to mother in law,father in law and sister in law.

Will the VO can ask my parents and sister that why your son in law is only inviting you and not your daughter. or will VO ignore it thinking that the letter should be only from sponsorer.