Make your 1099 mailings stand out and stay compliant with TF12121 2025 1099 Double Window Envelope (3 7/8″ x 9″) from 5Forms!
Preprinted with “Important Tax Return Document Enclosed”, these envelopes ensure immediate attention while protecting sensitive information. Crafted from quality 24# white wove paper with a secure printed lining, this confidential double-window envelope meets IRS regulations and is designed specifically for 1099 forms.
✔ Compatible with TF5104B, TF5105B and TF5106B
✔ Works with TF5104, TF5105 and TF5106
✔ For 1099s only
✔ Gummed flap for a secure seal
✔ Top Window: 3 5/8″ x 7/8″
✔ Bottom Window: 3 5/8″ x 1 9/16″
✔ Higher quantities available at discounted prices
✔ Starting at just $14.55
Need a self-seal version? See product TF12122.
🚨 IMPORTANT REMINDER
Tax forms must be mailed to a physical address.
P.O. Boxes cannot be accepted.
When you order from 5Forms LLC, you’re choosing a friendly company that carries all the printed products your business needs — while still offering low prices and exceptional customer service.
✨ Free UPS Ground Shipping on orders over $75 within the contiguous U.S.
(Shipping fees apply for Alaska, Islands, and Canada)
✅ 100% Satisfaction Guarantee for 90 days
Backed by the strongest guarantees in the industry.
Prefer to order by phone? Call 1-855-536-7675 to place your order with a Customer Service Agent. Our team is available Mon–Fri, 9am–5pm EST and ready to help!
📦 Order online here – TF12121 2025 1099 Double Window Envelope 3 7/8 x 9″
Don’t wait — order now and mail with confidence this tax season!