Envelope Security

Getting Started

Mail security is an important concern, especially when sending sensitive or private documents. This article explains the measures LetterStream takes to protect your information, specifically regarding the envelopes used for mailing.

In This Article

• Envelope Type Used
• Security Tint Explained
• How It Protects Your Information

Envelope Type Used

• LetterStream uses #10 window envelopes and larger flat-sized window envelopes.
• The window design allows the recipient’s address (printed on the document inside) to show through the envelope for accurate delivery.

Security Tint Explained

• Both the #10 window envelopes and the larger flat window envelopes contain a security tint — a printed internal pattern inside the envelope.
• The tint is designed to prevent the contents from being visible through the envelope.

How It Protects Your Information

• The security tint helps protect against both accidental exposure and intentional viewing of your documents.
• Even under bright light, the tint ensures that text inside is not readable through the envelope.