Documents needed for re-entry

[rashi_30]

Hey..
My mother has a 10-yr Multiple entry visa. She visited USA in 1999 for around 2 months. She is planning to come & visit me now. Earlier she came, the 1st time to visit my aunt (her sister-who sent the papers for her) & I was not here yet. Was in India. Can someone please tell me what all documents I need to send for her....what will she need at port-of-entry?
Thanx

[immihelp]

No need to send any documents. Nothing needed at port of entry.

Just buy airticket and visitor medical insurance. Insurance available for instant purchase at https://www.insubuy.com

[rashi_30]

Thanx a lot for the promt reply..
Wont an invitation letter be needed?
How will the customs officer decide what date is to be put on the I-94 card? Wont the customs have any problems or ask questions about who will support my mom's trip?

[immihelp]

No custom officer asks who will support her trip. All that is only at the time of getting visa.

Custom officer's job is to oversee import/export of goods/money/gold etc.

Even though it is not required, you may send the invitation letter.