Hi,
I received a package in the mail with two one-dollar stamps, and two 37-cent postage stamps and there are no ink-lines from the post office on the stamps or the package, so I am wondering if that means I can get away with re-using those stamps, and I am also curious to know why there are no ink-lines. Did it forget to pass through the stamping machine? Every few years, I get an envelope in the mail that has no ink-lines on the stamps, so does that mean that whenever that happens that I can re-use the stamps, or is there a drop of ink that is unseeable to the naked eye? Thanks in advance.