The 8 Best Window Security Envelopes (2023 reviews)

We know from years of feedback from readers, customers and amazon sellers, what most people want in a envelope. The prime business checks window security envelope is exactly that - it's a simple envelope that hits all the right notes. It is designed to fit quickbooks laser checks or any computer business checks, these business envelopes fit checks perfectly, with dual windows displaying essential information without leaking out sensitive details. The peel away glue tab is a nice feature. The window placement matches up perfectly without making changes. The amazing quality and strong seal is great fits to perfection.

These are high quality envelopes and are very reasonably priced. It is made with thick 24 lb.

Why We Like This:

Even glue and easy to peel
Perfect for quickbooks checks strong self seal
One of the new comers and featured product

Best For company: Aimoh Window Security Envelope

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If you want nothing but the best reliable envelope, then aimoh window security envelope is the one you should definitely consider, as it manages to bring a lot to the table. Aimoh’s double window security tinted self seal check envelope uses a premium adhesive peel and seal designed strip to create a strong, secure self-sealing seal. It is perfectly 3 5/8 inch x 8 11/16 inch to prevent checks from sliding and moving unlike others on the market, securing sensitive information to remain hidden even through the two windows. It is perfect for business and home office use.

It is manufactured from heavyweight extra white sturdy wove stock paper, combining a professional security tint pattern and smooth finish. The size is right so they don't wiggle out of alignment with the windows but the check slides cleanly into the envelope. It is perfect for quickbooks checks, and they have good adhesion. It is perfect for regular checks.

Why We Like This:

Works great with deluxe triple business checks
Delivers what they promise

Best For Mailing off letters: HERKKA unique Window

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10 security envelopes are designed with a premium security printed design to provide guaranteed privacy for your legal or business mail, offer the protection contents and sensitive information, a security tint makes envelopes hard to see through that ensures upmost privacy for your legal or business mail, offer the protection of contents and sensitive information, a security tint makes envelopes hard to see through that ensures upmost privacy for your everyday business tasks. They have a flip and seal design that makes it easy to close them without any hassle.

These are just fine and functional envelopes. It has 500 envelopes which can meet a long lasting supply, ideal for mass mailing of everyday business tasks. The security printing on the inside is good and will block anyone from viewing what's inside once it's sealed. The windows are clear and fit most standard documents. The tint on these envelopes is dark enough that you can’t read through the envelope and see what’s inside. These are SUPER cool and easy to use.

Why We Like This:

A good value for double window business envelopes
Lot of satisfied buyers

Best For Your timeline: Quality Park Top Window

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We would, of course, be remiss if we didn't mention quality park top window for daily purpose. These by Quality Park (Redi-Seal) are by far the GREATEST & EASIEST to use for mass mailings. The unique double flap design allows you to simply raise the lower flap and press to seal. The reflex blue pattern lining the envelope's interior makes it impossible to see the details of the contents, even when held up to the light. The windows in these envelopes work perfectly for both QuickBooks checks and invoices.

These are perfect for the busy office. The sticky seal is simply to keep it closed and not fall apart in the mail. These work well and are much more cost effective. These protect yourself and customer/client data with security features that keep personal information confidential while in transit.

Why We Like This:

Packaged well and self-seal always works
Lot of satisfied buyers

Best For letter: Aimoh super Secure Seal

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These envelopes are priced great and a good envelopethey are secure, you can not see them and they are easy to use and as described. The self-sealing envelopes are nice and work well. It is self adhesive after one removes the backing on the gummed part of the flap. The sticky strip is great and makes it so much easier to close.

The envelope is security rated so you shouldn't see any transparency when held up to a light source. The envelope is easy to format to fit addresses into the window. These work fine and the windows are large enough to make it easy for the address to be seen.

Why We Like This:

Easily read dual windows for everyday business mailings to easily display postal addresses
Combining a professional security tint pattern and smooth finish
Perfect self-adhering envelopes for mailing checks and/or invoices

Best For print: HERKKA Window Security Envelope

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If you’re looking for the perfect security envelopes with professional security tint, and strong, quick seal strips, in a great value 500 envelope supply, perfect for everyday use, herkka #10 security tint envelopes are the perfect choice. It has 500 envelopes which can meet a long lasting supply, ideal for mass mailing of everyday business tasks.

The 10 security envelopes are designed with a premium security printed design to provide guaranteed privacy for your legal or business mail, offer protection contents and sensitive information, a security tint makes envelopes hard to see through that ensures upmost privacy. There is a plastic film over the window. It is compatible with most inkjet and laser printers for easy printing.

These envelopes stay sealed, are not transparent and can be stuffed easily with standard printer paper. It is great in laser printer. It is ideal for standard business & legal documents and sensitive correspondence, manufactured with a windowless blank design allows for easy address printing or labels for mass mailing or to simply keep a bulk supply on hand for your home office.

Why We Like This:

Perfect for quick, mass business mailings
Awesome value, good paper, great toner adhesion from the printer too
New and hot release

Best With Most Standard Checks: Quality Park Window Security Envelope

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The quality park window security envelope is satisfactory and appropriate and fits well with your daily usage. These time-savers eliminate the hassle of everyday and large bulk mailings. The reflex blue pattern lining the envelope's interior makes it impossible to see the details of the contents, even when held up to the light. They hold stuff well. The old lick and seal envelopes seal themselves and become unusable in a very short period of time.

These are super flimsy and require time peeling the bottom seal up. It provides a strong, moisture-free secure seal and an extended shelf life. There is also no strip to pull off, which is nice.

Why We Like This:

An adhesive closure including a contact adhesive coating
Delivers what they promise

Best For Standard computer Check: PANDRI Window Security Envelope

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We would, of course, be remiss if we didn't mention pandri window security envelope for daily purpose. It comes with 500 #10 double window envelopes per box for long lasting supply, they are ideal for everyday business correspondence and large mailing tasks. The security pattern is present on both front and back sides of the inside of the envelope. Using the inner grain secrecy printing technology, the secure tone backing makes the envelope hard to see through and ensures the privacy of your invoices and statements under the light without any prying eyes.

These are slightly thicker, they'd be perfect. They arrive in a nice sturdy box and can be used to store them as they are being used. It allows for easy reading of the window's contents. These are a good value for your coins.

Why We Like This: