Re: Do USPS really check weight on prepaid labels ?
They photograph/record every label/package as it goes through the address reader, so it's not too much of a stretch to believe they also check the weight of every package.
That's why, as Jeff says, if you do it a lot they'll start rejecting your packages.
At my post office if you hand a package with online postage to a clerk, the first thing they do is throw it on the scale then look for some reason to reject it.
I take mine to the business district, where they have a huge volume and throw it in the blue drop box, it gets dumped into a truck and taken right to the regional bulk mail center and nobody even looks at it.
Once it's in the mail stream no human touches it again until delivery, and by then it's done and over with.
That said, they'd surely to notice if everyone's package was 2-3 ounces over, then when they load the truck it's overweight at 3/4 full... if this happens a lot you know they're going to crack down on it.
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