500#8 Gummed Double Window Security Check Envelopes - Designed for QuickBooks Checks, Business Mailing, and Security - Computer Printed Checks - Gummed Flap - 3 5/8 X 8 11/16

the product is 100% compatible to Quickbooks paychecks while insuring employee privacy.

Perfect size for our invoices. Great quality. Will buy again.

As my title says, these envelopes are excellent quality at a good price. I didn't even notice that I had changed from the more expensive ones the check companies sell. I definitely will order these again! (This is in stark contrast to the generic name/address labels I ordered from another company instead of the expensive Avery ones. The generic name/address labels were inexpensive, but poor quality and thus a total waste of money.)

Blue Summit Supplies are Awesome! I really don't have time to write reviews - but I love their products. They cost slightly less than their competitors - but I think their quality is slightly better. These are definitely "privacy" envelopes; and they seal securely. I use them for Intuit QuickBooks accounts payable vendor checks. We use the full sheet laser checks; keep the bottom stub for our records - mail the check and the middle stub (which has transaction detail) to the vendor. The QB check fits perfectly into these envelopes - with our name/address showing in the top window; the vendor name/address showing in the bottom window. Before, we bought from a "deluxe" supplier - and the price was almost 3x's as much (and sometimes their envelope window cut off the bottom line - which is a problem because it has the zip code... and sometimes it seemed their envelopes were getting a little "tight" to put my checks into). No problems with Blue Summit!

some of the envelopes did not seal well. I noticed that they had popped open. Might not be good if your sending checks through the mail as they could fall out of the envelope. Also, partially sealed flaps might mess up the postal sorting equipment.

This is a great value for the money. We use these for our company checks..

I had a hard time finding a double window security envelope that was reviewed as working well with checks printed in Sage Accounting. I use Sage 50 Accounting and I can say that these fit my checks perfectly! They are good quality - seal well with our Pitney Bowes mail machine and aren't too thin where you can see thru them. Plus, if you can find them thru Amazon Warehouse, are a bargain. Highly recommend!

These work perfectly on our checks that were designed for QuickBooks.They are better than the check window envelopes we have bought in the past from Staples and OfficeMax in three ways:1) The company return address window does not cut off the top of the company name2) the addressee / mail-to window blocks the memo line at the bottom of the check enough to make it unreadable3) we never go through 500 checks fast enough to keep those peel-and-stick envelopes from drying out. I'm not sure how long they are supposed to last, but we inevitably end up sealing them with glue sticks over the dried peel-and-stick. So these do require moistening, but they will last longer, and seal more neatly.