A couple ways.
First, you get to record a video greeting card as part of the flow. This allows you to really sell your recipient/victim on the prank.
Second, we make sure that all the info is customized and specific to the recipient. If you order the airline ticket prank for example, we'll email you to get your frequent flyer numbers and stuff and make sure that we get the right legal names on the fake eTicket.
We tested it out on our wives last week. It...was...hilarious.