I have emails and receipts for nearly every LE that I ever bought from ReefFarmers, Atlantis, etc. For those few that I don't, I got them from the original supplier who would send a text or PM if I needed them to.
What I don't want is a so-so look alike from a wild colony that ends up not being as nice when it is sold to me as the real deal - then I wasted tank space on it and might have passed on the real deal in the mean time. I don't mind look alikes if they are labeled as such, and appropriately priced, but I will treat them as unknowns since they truly are for a while.