Double window check envelopes flip and stick are self-sealing business check envelopes with two clear address windows and a fold-and-press closure that requires no moisture and no backing strip to remove. Fold the flap, press it down, and the seal holds. Your business return address shows through the top window. The payee mailing address shows through the bottom window. Both come directly from your pre-printed check, so no address labels or handwriting are needed at any point. Every envelope is security-tinted and guaranteed to fit standard US business check formats.
What Are Flip and Stick Check Envelopes and How Does the Closure Work?
The flip and stick closure is a self-seal mechanism where the adhesive is exposed directly on the envelope flap. You fold the flap over toward the envelope body and press. The adhesive bonds without requiring you to peel a backing strip first or apply any moisture.
This closure type suits high-volume AP and payroll mailing runs where the sealing step needs to be as fast as possible without any preparation. You take the envelope, fold the check inside it, align the address windows, fold the flap, press once, and move to the next envelope. There is no strip to find and remove before each seal.
Flip and Stick vs Peel and Seal Check Envelopes: Which to Choose
Both flip and stick and peel and seal are self-sealing double window check envelope formats. The difference is entirely in the closure mechanism.
Peel and seal has a protective backing strip over the adhesive. You peel the strip off, then fold the flap down and press. The extra step of removing the strip is minor but adds a fraction of time per envelope. Some users prefer peel and seal because the adhesive stays protected until you are ready to seal.
Flip and stick has the adhesive exposed and ready. You fold and press directly. No strip to remove. Faster per envelope when working through large batches, though the adhesive is exposed without the protection of a backing strip.
For the peel and seal version of this same double window format, see our double window check envelopes peel and seal. For the traditional gummed seal version, see our double window check envelopes with gummed seal.
Security Tinting and Guaranteed Check Fit
Every flip and stick check envelope includes interior security tinting across the full inside surface. The dark printed pattern prevents check amounts, account details, and payee information from being readable through the envelope paper when held to light. Only what shows through the two address windows is visible from outside the sealed envelope.
These envelopes measure the industry-standard 3 5/8 by 8 5/8 inches and are guaranteed to fit all Checkomatic check formats. They also fit most standard US business check stock from other suppliers. The double window positions align with the standard address field placement on voucher checks, checks on top, checks in middle, and checks on bottom formats.
For computer checks on top and QuickBooks checks on top, the payee address prints on the lower portion of the check sheet and shows cleanly through the bottom window when the check is folded and inserted.
Why Choose Checkomatic for Self-Seal Check Envelopes
Checkomatic has supplied business check envelopes from Monroe, NY since 1997. Every envelope is security-tinted and guaranteed to fit our check formats. Bulk pricing scales from 100 to 5,000 envelopes with savings up to 81% at higher quantities. All orders carry a 30-day satisfaction guarantee. Standard delivery in 3 to 5 business days with rush options available.
Double window check envelopes flip and stick are a practical choice for any business that seals large check batches regularly and wants a self-seal closure that requires no backing strip removal. Every envelope ships security-tinted, correctly sized, and ready for immediate use alongside your check stock.
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