sleepy_eye - 8:14 pm on Jun 9, 2010 (gmt 0)
Since alot of times people using stolen cards place orders all over the net, they sometimes can't remember what they order.
On suspicious orders we call we sometimes read back what they ordered wrong. Most people will correct you right away and get anxious or at least ask their husband/wife ..etc if what they are being told is correct. I would bet since you sell high value items they would rember a major purchase alot more than a smaller one. I know when I got my wide screen my wallet remembered it for a long time.
Not fool proof but with other bad points tipping the scale this has worked for us.