03-05-2014 09:48 AM
Hi dooo, sorry to hear that you are having issues with a customer envelope size. Here are the HP Photosmart 7520 e-All-in-One Printer Series Printer Specifications and unfortunately the size you are attempting is NOT supported. You will be able to see what is supported and go from there.
Thanks for your time.
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W a t e r b o y 71
I work on behalf of HP