Priority Stamp Question

Are USPS priority stamps uniquely identifiable? Looking at two it would seem the numbers are different, not sure if the number is a transaction number or what


Comments


[2 Points] nsgiad:

If you are paying in cash (which you should be) then even if they are tracking numbers (to see which PO they were purchased from) then it shouldn't matter as long as you aren't mailing out packages from that PO as well.


[1 Points] None:

Probably very unimportant if the number means anything. Why do you ask? If you don't mind.