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A standard single window envelope shows the recipient's address from the document inside. A double window envelope shows both addresses: the recipient's address in the lower window and your return address in the upper window. Both come from the printed document inside. You never write on the envelope, never apply a label, never print a separate address on the outer piece. Load the document, seal it, and both address fields are handled. That's the format that billing departments, payroll processors, insurance carriers, and accounts payable teams standardize on when they're sealing hundreds of pieces at a time and every eliminated step matters at volume. Available in gum flap, peel-and-seal, and self-seal formats from Business Envelopes. Free shipping on every order with no minimums.
This is the question most buyers have before placing a first order on double window envelopes: does my document need a special template, or do my existing check and invoice layouts already work?
For QuickBooks, Quicken, Sage, and most standard accounting software, the check and invoice templates are already formatted to align with standard double window envelope positions. The upper window displays the return address field that sits in the upper left of a standard business document. The lower window displays the payee or recipient address that sits in the lower left. If you're printing checks or invoices from standard accounting software on standard 8.5 x 11 stock and folding them into thirds, the address fields land in the windows without any template adjustment.
If you're using custom document layouts or a non-standard template, the alignment test is simple: print one document, fold it into thirds, and hold it up to the envelope. Both address fields should show cleanly through the windows with no text cut off at the edges. If they do, you're aligned. If not, the document margin positions need a small adjustment in your software.
This page covers the open-front blank format. For production use, choose the closure that suits your sealing workflow:
For single window formats across the full range of commercial sizes and closure types, browse the window envelope category. For bulk pricing on double window envelope programs across multiple formats, request a quote here and we'll have numbers back to you the same day. Ships same or next business day on blank stock.
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