Security Envelopes

Specially designed with check security in mind, our high security check envelopes protect your critical bank routing and account information with the use of an inside security tint and unique window positioning.

Protect Your Critical Check Information

DURASEAL Envelopes by Relyco

Our high security check envelopes are specially designed with check security in mind. Unlike standard #9 and #10 window envelopes, our check security envelopes protect your critical bank routing and account information with the use of an inside security tint and unique window positioning.  Our check envelopes are always in stock and ready to ship.

DURASEAL Check Envelopes Feature:

  • Unique windows positioned slightly higher to conceal confidential bank account information
  • Inside security tint to protect your documents from unauthorized readers
  • Full gum flap for a complete, secure seal
  • Special design for optimum machine inserting
  • #10 single window and #10 double window reverse flap security envelopes, ideal for machine inserting when the mailing address is located on the bottom of the document
  • Imprinting in up to four colors on the front and/or the flap