Not an expert, but I think the point of having the receipt of postmark gives you a paper trail that says you filed on that day. Whether or not it made it to the USPTO.
I assume this means you would have to ship from the post office directly or your tracking at least gets an update beyond "label created." Typically, the first tracking step I get is for my city's distribution center.
I assume this means you would have to ship from the post office directly or your tracking at least gets an update beyond "label created." Typically, the first tracking step I get is for my city's distribution center.