documents for second time visitors

[visahelp]

My parents got a 10 yr visa when they visited me 2 yrs back. They're now going to visit a second time, but this time I've a GC and they're retired. Will they encounter any problems on account of this at the port of entry? Do I need to mail them any documents again eg: invitation letter, affidavit of support, financial support. Do they need to show again proof of returning back eg: proof of residence. They have a round trip ticket.

Thanks in advance for the replies.

[visahelp]

documents for second time visitors

Ok, I was hasty in posting; no need to send any documents, just a ticket and medical insurance will do.

https://www.immihelp.com/usa-visas/vi...rvisa.html

Please let me know if I'm missing anything. Thanks.