We have found these to be better quality and thus more secure than cheaper envelopes on other online sites. Our donors deserve the confidentiality these provide.
There's no software to print the addresses on paper to fit into the slots. It's very frustrating when trying to use it for things other than quick books that does not automatically place the address in the address boxes.
I needed a new box of window envelopes for sending company checks but could not find an exact match to the envelopes I had been using. Out of 3 different styles of number 9 envelopes on the shelf the windows were either too small and cropped the return address or too large (which revealed a portion of the payment amount on the check) or were positioned further to the right covering a portion of the logo. It would be helpful for reordering if the manufacturer printed the product number inside the envelope next to the printed security pattern.