After twilight_paradox informs Purism that she/he transfers her/his pre-order for Librem 5 to you, actually to your E-mail address within related Purism database, you will log into your Purism Shop account and confirm there that you are owner of here related Librem 5 pre-order. I suppose that your forums.puri.sm E-mail address is the same as your Purism account one and even if you do not have already opened account just contact support@ Team with related pre-order purchase number within title of this message.
@Sharon I gave you intro into where you are about to be careful/focused and therefore almost ignored your second question. Anyway, when you receive your Librem 5 do not forget to inform us about when this Linux phone actually shipped to you: Estimate your Librem 5 shipping - #1137 by janvlug.
Yes, exactly, thanks! Here are other related and useful info/intro that Sharon needs to skim and even read carefully: Refund for Librem 5 - #13 by Quarnero.