Double window envelopes for invoices and statements are self-sealing business envelopes with two transparent windows designed for outgoing billing documents. When a QuickBooks invoice, customer statement, or billing notice is folded and inserted, your company name shows through one window and the customer's address shows through the other. The flip and stick closure seals the envelope by folding the flap and pressing it down. No moisture. No backing strip to peel. No labels or handwriting required for any address. Every envelope is security-tinted and available from 250 to 10,000 units.
What Are Double Window Envelopes for Invoices and Statements?
Invoice and statement envelopes differ from standard check envelopes in the window position layout. Check envelopes are designed for the address field positions on a check stub. Invoice and statement envelopes are designed for the address field positions on invoice forms, customer statements, and billing notices from accounting software.
When you print an invoice or customer statement from QuickBooks, the software places the bill-to address in a specific position on the printed form. Double window invoice envelopes are designed so that address lands behind the correct window when the form is folded and inserted. Your company return address lands behind the other window. The envelope is ready to mail without any additional labeling or writing.
These envelopes are used in accounts receivable workflows: sending customer invoices, monthly statements, billing notices, and any mailed business document where the recipient address and sender return address both appear on the form being enclosed.
QuickBooks Invoice Envelopes: Compatibility With QuickBooks and Accounting Software
QuickBooks users who mail customer invoices and statements by post use these envelopes alongside their printed QuickBooks invoice forms. QuickBooks places the customer bill-to address in the standard invoice address block position when printing. These double window envelopes are positioned to show that address through the correct window when the invoice sheet is folded into thirds.
Compatible with QuickBooks Desktop invoice printing, QuickBooks Online printed invoices, and most other accounting software invoice and statement formats that use standard address block positions. If your software places the address in a non-standard location, check the window alignment on a test fold before ordering in bulk.
Flip and Stick Closure: How It Works on Invoice Runs
The flip and stick seal is a fold-and-press self-seal mechanism. The adhesive is on the envelope flap and ready without a backing strip to remove. You insert the folded invoice, fold the flap over, and press. The envelope is sealed in one motion.
For high-volume invoice or statement mailing runs, this matters. Processing 200 or 500 outgoing invoices per billing cycle means sealing 200 or 500 envelopes. A self-seal that requires no moisture and no separate peeling step is meaningfully faster than gummed envelopes over a full billing run.
For check mailing with peel and seal or flip and stick options, see our double window check envelopes peel and seal and double window check envelopes flip and stick. For a complete overview of all envelope options, see our check and business envelopes catalog.
Security Tinting on Every Invoice Envelope
Every envelope includes full interior security tinting. The dark print pattern across the inside surface prevents invoice amounts, account numbers, and customer details from being readable through the envelope paper when held to light. For outgoing invoices that carry balance totals and account information, this protection is relevant beyond just payment security.
Standard #10 envelope size at 3 5/8 by 8 5/8 inches. Quantities scale from 250 to 10,000 with pricing discounts at each tier.
Why Choose Checkomatic for Invoice and Statement Envelopes
Checkomatic has been supplying business envelopes and check accessories from Monroe, NY since 1997. Every envelope is security-tinted as standard. All orders carry a 30-day satisfaction guarantee. Standard delivery in 3 to 5 business days. Rush options available for billing cycle deadlines. Custom quantity quotes available above standard tiers.
Double window envelopes for invoices and statements with flip and stick closure are the right choice for businesses running regular billing cycles from QuickBooks or other accounting software and needing a self-seal mailing envelope that matches their invoice form layout without any manual addressing.
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