Check Envelopes

Sending a business check in the wrong envelope creates problems that most people don't notice until something goes wrong. The address doesn't show through the window properly. The check amount is visible through the paper. The envelope tears during sealing. Or the check simply doesn't fit, which means folding it and losing the professional look you were going for.

Checkomatic has been manufacturing check envelopes and business checks together from Monroe, NY since 1997. Our envelopes are designed around our check formats, so the windows line up correctly, the addresses display cleanly, and the check details stay hidden behind the security tint. Every envelope we carry is guaranteed to match our check stock without any reformatting of your software.

What Does a Check Envelope Look Like?

A check envelope looks like a standard white business envelope on the outside. What sets it apart is the double window on the front. One window shows the return address printed on the check. The other shows the recipient's mailing address, also printed on the check itself. You do not handwrite either address. You fold the check, slide it into the envelope, and both addresses appear in the correct windows automatically.

This is what makes check envelopes a time saver in any business office. There are no labels to print. No addresses to handwrite. No risk of writing the wrong address on the wrong envelope. The information on the check does all the work.

The Double Window Design Explained

The double window in a business check envelope has two clear openings cut into the front of the envelope. The top window shows the sender's business name and return address, which is pre-printed on the check. The bottom window shows the payee's name and mailing address, also pulled from what is printed on the check at the time you run your accounting software.

This design works because your computer business checks already carry all of that information. When you print a check through QuickBooks or another accounting platform, the software populates the payee address field from the vendor record. Fold the check along the standard perforation, insert it into the double window envelope, and both addresses line up perfectly in their windows.

The check amount, memo line, and signature are all hidden behind the security tinted paper of the envelope body. Anyone handling the mail only sees the addresses. The financial details stay private until the envelope is opened by the intended recipient.

Business Check Envelopes: Gummed Seal vs Peel and Seal

We offer two sealing options for our business check envelopes. Both include the same double window design and security tinting. The difference is in how you close the envelope.

Gummed Seal Check Envelopes

Gummed seal envelopes have a traditional moisture-activated adhesive on the flap. You moisten the flap, press it closed, and the seal holds firmly through the mail. This is the standard option for offices that seal envelopes in small batches. The adhesive bond on gummed seal envelopes is strong and reliable. For high-volume mailing, a damp sponge or envelope moistener speeds up the process considerably.

Self-Sealing Check Envelopes (Peel and Seal)

Peel and seal envelopes have a peel-off strip that exposes a pressure-sensitive adhesive underneath. You peel, fold, and press. No moisture required. This option is preferred by offices running large AP or payroll check batches where sealing dozens of envelopes quickly is part of the workflow. The seal is clean, consistent, and produces a slightly more polished result than gummed seal on a per-envelope basis.

Both options are available in our check envelope collection. Both include security tinting and are sized to fit standard business checks precisely.

QuickBooks Envelopes for QuickBooks Checks

QuickBooks check envelopes are double window envelopes sized and positioned specifically for QuickBooks voucher checks and 3-on-a-page checks. The windows are placed so that the return address and payee address fields in the QuickBooks check template line up with the openings in the envelope face without any adjustment to your software settings.

If you currently order QuickBooks compatible checks, pairing them with our check envelopes eliminates the guesswork entirely. The windows align. The addresses display. The mailing is done.

Why QuickBooks Envelopes Work Differently From Regular Envelopes

A regular #10 business envelopes have a single window positioned for a standard letter with an inside address. A QuickBooks check envelope is wider, has two windows instead of one, and positions both windows to match where the addresses land on a voucher check sheet. Using a regular #10 envelopes with a QuickBooks check means the windows will not line up correctly. You end up with blank paper showing through or part of the check visible where it should not be.

Our check envelopes are built for check on top QuickBooks checks and 3-on-a-page QuickBooks checks. Order them together and the whole mailing process becomes routine.

Check Envelope Size: What You Need to Know

Standard Business Check Envelope Dimensions

Our double window check envelopes measure 3 5/8 inches by 8 5/8 inches, which is the industry-standard size for US business check mailing. This is sometimes referred to as a number 8 envelope in commercial mailing terminology.

This size accommodates:

A standard 8.5 by 11 inch business check sheet folded into thirds, with the check portion at the top or bottom depending on your format. The fold creates a tri-fold document that slides into the envelope cleanly and positions both addresses in the windows without overlap or shifting.

If your checks are printed in a different format or you are using a non-standard layout, contact us before ordering. We have been printing and matching envelopes to check formats for 28 years and can confirm fit before you commit to a batch.

Security Features on Every Check Envelope

Check envelopes do not need fraud protection in the same way check stock does, but privacy protection matters. Our envelopes include security tinting across the full interior surface. This is the dark interior print that makes the contents of the envelope completely unreadable when held up to light.

Without security tinting, a check placed in a plain white envelope is sometimes legible from the outside when held to bright light. The amount, account numbers, and routing information can all be readable to someone who handles the envelope in transit. Security tinting eliminates that risk. The only information visible from outside the envelope is what shows through the two address windows.

This is why pairing your business checks with proper security-tinted check envelopes is considered standard practice in business banking compliance.

Envelopes for Checks: Which Type Does Your Business Need?

The right choice depends on what type of checks you are sending and how your AP or payroll workflow is structured.

Use gummed seal check envelopes if your team seals envelopes manually in small batches or prefers the traditional adhesive feel. These work well for offices sending under 50 checks per mailing cycle.

Use peel and seal check envelopes if your team runs large check batches and sealing speed matters. These work well for property management companies, payroll-heavy businesses, and any operation running regular high-volume AP payment runs.

Both types pair directly with our business check accessories and our full line of business deposit slips if you want to consolidate your order.

Why Order Check Envelopes From Checkomatic

We manufacture and ship from Monroe, NY. Our envelopes are made on 24 lb white wove paper stock, which is the weight standard for professional business mailing. It holds its shape in transit, feeds cleanly through standard office printers if you are printing return addresses or branding, and does not look flimsy or cheap when it arrives at a vendor or employee's address.

Our check envelopes are guaranteed to match our check formats. If you order your QuickBooks checks and check envelopes from us at the same time, the windows will align. That guarantee is something you cannot get when you buy checks from one supplier and envelopes from another.

Bulk ordering is available with volume discounts that increase as quantity grows. Rush shipping is available for urgent orders. Standard orders ship within 5 to 7 business days.

For answers to common ordering questions, visit our business checks FAQ page.

Frequently Asked Questions About Check Envelopes

What size are business check envelopes?

 Our standard double window check envelopes measure 3 5/8 inches by 8 5/8 inches. This is the correct size for standard US business checks printed on 8.5 by 11 inch sheets, folded into thirds. It is sometimes labeled as a number 8 envelope size in commercial supply catalogs.

What does a check envelope look like compared to a regular envelope? 

A check envelope is narrower and longer than a standard letter envelope. It has two clear windows on the front instead of one. The top window shows the sender's address. The bottom window shows the recipient's address. Both come from the pre-printed information on the check itself. The interior is security tinted to keep the check contents private.

Do your check envelopes work with QuickBooks checks? 

Yes. Our double window check envelopes are sized and positioned for QuickBooks voucher checks and 3-on-a-page checks. Both address windows line up with the address fields in QuickBooks without any changes to your software settings.

What is the difference between gummed and peel and seal envelopes?

 Gummed seal envelopes use moisture-activated adhesive. You wet the flap and press to seal. Peel and seal envelopes have a peel-off strip covering a pressure-sensitive adhesive. You peel, fold, and press without moisture. Both seal securely. Peel and seal is faster for large batch mailing.

Do the envelopes have security tinting?

 Yes. All our check envelopes include dark security tinting on the interior. This makes the contents of the envelope unreadable from outside, even when held up to light. Only the addresses showing through the double windows are visible.

Can I order check envelopes without also ordering checks?

 Yes. Check envelopes can be ordered independently. Many customers who already have check stock on hand order envelopes separately when they run low.

How many check envelopes come in an order?

 We offer multiple quantity options to suit different mailing volumes. Volume discounts apply automatically as quantity increases. Contact us if you need a quote for a large custom quantity.