security envelope
Patterned-lined envelope
A security envelope has an interior pattern—crosshatching, tinting, or other designs—that prevents the contents from being read through the paper without opening it.
Standard for mailing checks, tax documents, and other sensitive correspondence: The bank statement arrived in a security envelope.
- paddedFilled with soft material
- mailerEnvelope designed for posting
- confidentialMeant to stay secret
- tintedGiven subtle coloration
- privacyFreedom from observation
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