How can you retrieve your old World of Warcraft authentication key?

Answer:
you would probably have to call Blizzard's billing department during normal working hours. at the very least, this is a question that should be asked in the customer service forum at HTTP://forums.worldofwarcraft.com
First answer by Keeker1. Last edit by Keeker1. Contributor trust: 85 [recommend contributor recommended]. Question popularity: 1 [recommend question].