Had a bit of a snafu, but worked it like this:

For the Jessi G2 package, I used my P6 Serial #
For the Poser 7 update is used my P7 Serial #

No probs.

"Few are agreeable in conversation, because each thinks more of what he intends to say than that of what others are saying, and listens no more when he himself has a chance to speak." - Francois de la Rochefoucauld

Intel Core i7 920, 24GB RAM, GeForce GTX 1050 4GB video, 6TB HDD space
Poser 12: Inches (Poser(PC) user since 1 and the floppies/manual to prove it!)