Clarification regarding Sponsor Visitor Visa for Parents

[Ram Neema]

Hi,
I am planning to sponsor visitor visa for my parents. I would like to know whether I need to send below original documents to my parents or just scanned copy would work?

1. Employment Verification
2. Bank Account Verification
3. Invitation Letter.
4. I797B

I have read that Consulate may ask for my original Birth certificate. The problem here is that my birth certificate is with me (in USA). What are options here ?

[jnk]

Usually original birth certificate requires. Please read,

http://www.immihelp.com/visitor-visa...a-usa-faq.html

Other documents you can send scanned copy.

List of sponsor documents,

http://www.immihelp.com/visitor-visa...documents.html