I've got this whole 'I'll ship the same day or refund 1/2 your order payment immediately' thing going, so I always ship right away.I also send out Certificate of Posting references after the items are mailed.Right now, I've got about a dozen of those unread, even though there were sent within a few hours of ordering - that's with about 60 outstanding orders right now - so 20% of my customers haven't checked in within 2 days of ordering.Keep in mind, lots of clients aren't like us, hanging about and checking our accounts and whatnot. They place an order, and if it's not there in a week or so, only then do they sign in to send you a message and ask about it, and then read your PM.And yes, you are going to get some clients that never check back in, ever, even once they receive their parcel. It's not in their mindset at all. After all, when you order something off Amazon and it arrives, you don't sign in to Amazon - you open your new shit and play with it.So you have to build in a certain percentage for all your clients that some of them are going to let it go and auto-finalize, or not respond to or even read your PMs unless they sign back in with a problem.I realize that is no help with your situation, just saying that personally I recognize that's gonna happen sometime, plan for it, and try to be all zen-like and shit and take it in stride and not let it bother me. Not always easy when you ship a $1400 Airsure priority, it get's there in 2 days, and they never once came back and read their PMs - or bother to finalize their order. Just had two of those finally clear - the bright side is I don't hedge escrow, and BTC has gone waaaaaay up in the meantime, so I actually made about $450 off the delay.Remember, unless there's a delivery or product problem, consumers are used to ending contact with the website they purchased from once they finalize the purchase. Edit to add my actual advice/opinion - mail that fucker out now! How is the client going to feel if in a week it's still not here, and sign in to ask you about it, and find you haven't sent it because they didn't read a PM? That turns a good purchasing experience into a so-so one, and means they get their purchase far later than they expected. For me, the customer satisfaction of getting their purchase promptly outweighs my need to have them 'promise' to finalize upon receipt.