100 9 X 12 Self Seal Security Catalog Envelopes - Designed for Secure Mailing - Securely Holds up to 60 Sheets of Paper with Strong Peel and Seal Flap (100 Envelopes)

How do security envelopes protect my mail contents? Security envelopes are designed with special features to help protect your mail's contents from being seen or tampered with during transit.

Browse security envelopes at Staples. Free next-day delivery when you spend $35+.

Shop secure envelopes featuring self-seal, security tint, and various sizes like #10, #6 3/4, and more. Perfect for business mailing, legal documents, and personal use. Choose from white, gummed flap, …

Office Depot® Brand #6 3/4 Security Envelopes, 3-5/8" x 6-1/2", Gummed Seal, White, Box Of 500 4.7 out of 5 stars, average rating value. Read 154 Reviews. Same page link.

750#10 Security Envelopes, PANDRI Self Seal Windowless Envelopes, Security Tint Pattern for Secure Business Mailing, Invoices and Statements, Size 4-1/8 x 9-1/2 Inch - 24 LB

The security tinting and strong white exterior makes these envelopes ideal for mailing payroll checks, invoices or any correspondence of a sensitive or confidential nature.

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Say goodbye to licking envelopes and hello to these easy-to-use 55-Count Press-and-Seal Security Envelopes from up&up™. These white envelopes have a press-and-seal closure that requires no …