No certification sticker

RVIA certification doesn't really seem to carry any weight at all...it's not like you can go to them and make a complaint about something, expecting them to do anything about it.

A lack of the sticker wouldn't be a bar to a purchase as far as I'm concerned.

It refers to this thread: should i buy a sun lite 19bh camper.

I guess you didn't get an answer in your other posts?
My thoughts are it doesn't have a RVIA seal. This seal is supposed to certify that the unit was built in accordance with RVIA specs (which must be pretty loose..) and if it doesn't have one, the manufacturer either hasn't followed the requirements or there was some short cut taken.
It could mean something as minor as it doesn't have a carbon monoxide sensor or as serious as having more than the allowable formaldehyde emissions. Or, even something structural.

Huh? Describe where the statement is used, that help us help you