There is nothing in a delivery confirmation number that will trace specifically to you (there is no shipper number or account number for a mailer in the DCN).
However, the way you are doing it is playing with fire.
I wouldn't count on a lack of processing power to keep me safe here. I don't know how much processing power eBay has, but it gets cheaper every day. And with good database software like Oracle you don't necessarily NEED a ton of processing power to find stuff like this.
I am NOT an IT expert, but in my last job the IT Director always said that Jeff is not an IT person, but he knows enogh about it to be DANGEROUS to the IT Department
In other words, I don't know how to set up or run Oracle, but I know what it is capable of.
Others may have a different view, but my stealth methodology has always been to eliminate ANY possible way of linking accounts. So, maybe you will be OK doing this, but I am just saying that I wouldn't do it.
Good Luck!
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