These double-window security envelopes it indicated compatible with the Quickbooks laser checks the check fits in the envelopes but it doesn't quite line up. The memo and pay to sections of the checks will show through the windows of the envelopes and that doesn't provide the privacy we wanted because when we entered a memo message for the check it will show thru for everyone to see the message and the name of the payable to therefore everyone will know it's a check inside. The check already have the Payable and Memo pre-printed on the checks so it doesn't have anything to do with not lining up the checks properly in the printer. The windows need to have a little more coverage in these areas like about 3/16" to 4/16". Other than that it's a good envelope and cheaper than buying the ones offered by Quickbooks. I'll give it a 5 stars If they fix the windows issues.
Envelopes offer security with the blue security lining. They are easy to "stuff" and easy to seal. The windows line up exactly with my checks no need to change anything. Good quality good value.