There is always some degree of risk involved in purchasing beans online. If a person does not choose a reputable seedbank and pick a reputable breeder's gear from a reputable seedbank there is a chance they will receive garbage genetics or nothing. If nothing it could be they were ripped off and other times it can be because a customs department snagged their gear when it tried to clear customs. As long as herb is illegal customs departments can and will be a pain in the keister and the very best that anyone can do is to pick seedbanks with the best stealth shipping methods.
If someone wants to check seedbank ratings the oldest longest continually running seedbank rating site is Greenman's. It can be found at:
http://www.seedbankupdate.com/su.html
Another rating site, though one I do not care for as much because they rate by reported good/bad experiences but do so in a way where with just a few reports a seedbank can receive a high rating. Greenman begins with a lower rating and waits until enough reports flow in to have a more truly accurate rating before he give them a higher rating on his site. But the site does have some parts of it that still make it worth checking out.
http://bestseedbank.com/