AOH Journey 5's with Indentation

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Not really an "error", but this should be of interest to error collectors and those trying to decipher the anomolies of the printing process. I found this in a hundred-note bundle .... the middle note (AOH 7182472) has a very clean and defined indentation that corresponds with the foil strip on the face of the note.  Any thoughts on how this occurred are appreciated. ( Not sure if the image is actually attached to this post as I only see it while I'm logged in ... have I loaded it incorrectly? ).

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Yes, I have seen this many times. it looks like a poor quality note.

It is normal to see this beside good notes. Not sure why it is but unless the note is folded with no ink inside then there is nothing special.

I have even seen some really cool folded notes but when I opened it there was ink inside so the notes were damaged AFTER they were printed.