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Your cart is empty.Quality Park #9 Security Envelopes are designed to fit QuickBooks computer generated invoices and statements. These #9 envelopes (not for QuickBooks checks!) are also often used as reply or return envelopes in business mail. Our business envelopes have careful window placement to show only the sender and receiver addresses while social security numbers and other data remain private and protected. For privacy, our security envelopes have a reflex blue tint with safety pattern to prevent prying eyes from reading sensitive information, even when held to light. You won't miss licking the gummed seals on basic envelopes. Our Redi-Seal self seal envelopes are a tidy, timesaving upgrade — just raise the lower flap and press for a no-fuss seal. 24 lb white wove paper with side seams give Quality Park envelopes a professional appearance. These bright white safety envelopes are perfect for payroll, accounts payable and all sorts of confidential business applications. Stock up and get more for your buck; bulk boxes of 500 security envelopes are made for high volume envelope users. Ideal for accountants, law offices, or any workplace or small business that moves large volumes of mail. Envelope dimensions are 3-7/8 x 8-7/8 inches. Top window dimensions are 1-3/16 x 3-1/2 inches, 3/8 inches from the left and 2 inches from the bottom. Bottom window dimensions are 1 x 4 inches, 3/8 inch from the left and a 1/2 inch from the bottom.
Alivia Kristen
2025-08-12 17:15:40
These envelopes are exactly what I was looking for to send out our statements every month! The envelopes seal nicely, and there is no licking or taping needed at all. Quick and easy to stuff and stamp! Shipping was super fast too, as to be expected with Amazon Prime :)
Kindle Customer
2025-07-09 15:11:08
Double window envelopes, invoice sized (slightly smaller that a #9), with pre-gummed flaps does the job. It is not heavy weight paper but I haven't had one come apart. Works for the statements I send out and can take up to 4 sheets of 8.5 x 11 size paper before you start getting a bit tight (I have gotten up to 6 pages in there VERY tightly and creatively). This is my third box. They are priced right so I keep re-ordering. They arrive pretty darn fast, too. Arrived boxed in an Amazon quality box so no scrunched edges.
Customer
2025-06-17 14:48:43
I use it to mail invoices monthly. I like the self seal feature. Envelope is well made.
Diana
2025-05-21 12:23:10
The quality of this product has decreased significantly over time. The last batch of envelopes I received has major flaws and was beyond redemption.1. Poor adhesive (many envelopes opened in transit and mail was lost or damaged as a result)2. 1 out of every 2-3 envelopes is ripped at the flap. This means I'm not able to use 30%-50% of the product I paid for.Will not order this product from this vendor again.
S. Stolberg
2025-04-17 14:23:25
I've been using these envelopes for a couple of years now and they really work well. I've tried switching to a different brand of self-sealing envelopes but they were more of a hassle to seal closed. These Redi-Seal double window envelopes are quick and easy to use, and they fit the laser checks we use in our small business very well. Amazon sells them for a good price, too!
Garoovy
2025-03-19 14:31:59
At first, I was a little skeptical about ordering these envelopes, but since they were from Amazon, I was sure I would have no problems if they didnt work correctly. I can say that though these envelopes are a tiny bit smaller than the "Quickbooks" envelopes, they work perfectly. The seal is great, and I will be using these from now on. You cannot find a better price anywhere.
Kathy from TX
2025-01-09 17:31:52
These envelopes work great with my quickbooks invoices. They are a perfect fit! I also love that they are so easy to seal. These envelopes would be a little too big for the quickbooks checks, but for invoicing and statements they are the right size. I will be ordering these from now on!
Carla A. Scarborough
2024-12-24 13:32:35
The quality of these envelopes is getting worse and worse. The adhesive is not in the right place. Amazon should check with supplier to see what's going on. The last 3 boxes I received of these had this problem. The last box there were a LOT of them that I had to glue. That defeats the purpose of buying these. It might be hard to see in the picture but the adhesive on the top flap is too low to connect with the bottom flap. The adhesive needs to be on top of the top flap or it won't seal.
Customer
2024-11-25 09:39:34
Envelope is thick, secure, however if you are using Quickbooks cheques DO NOT BUY, because of the size and position of the windows, it will show the confidential information on the cheque (ie. the amount).
User
2024-11-24 19:00:07
The envolopes do not self seal the glue does not stick.
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