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Look No Further for Maximum Security

Our most secure premium laser check featuring 17 built-in security features. If you want the most comprehensive array of security features available on the market, the DETERACHEK line of premium laser check stock is the one for you.

The most secure check we offer, the DETERACHEK line is loaded with 17 fraud-deterring security features, including a Fourdrinier or “true” watermark that has been manufactured into the paper, as well as Thermochromic Ink.

This unique feature responds to heat by temporarily disappearing when rubbed or exposed to a heat source, making the check impossible to accurately duplicate using a photocopier or scanner, while providing an effective means of authenticating the document.

DETERACHEK Features

17 fraud-deterring security features including a Fourdrinier Watermark and Thermochromic Ink for maximum security

  • 3 2/3” checks with check on top or bottom
  • Four layouts with optional stub perforation on two layouts to assist in hand-folding

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DETERACHEK Security Features

  • Simulated watermark
  • Microprinting
  • Padlock security
  • Non-negotiable stub-backer
  • Endorsement warning
  • Anti-splice backer
  • Copy-void endorsement
  • Image-friendly amount box
  • Voidless postal window

  • Copy-void pantograph
  • Covert florescent fibers
  • Enhanced toner adhesion
  • Solvent-reactive color spotting
  • Gradient two-color background
  • Thermochromic heat-reactive ink
  • Fourdrinier true watermark
  • Coin-reactive mark

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Client Stories


We knew Relyco would provide a high-quality product delivered at a competitive price and meet our tight timeline. We’ve never considered looking elsewhere, but I’m sure we would be hard pressed to find another vendor who could do the same.

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Cook Illinois Corporation logo
Assistant to the President and Chief Financial Officer, Cook Illinois Corporation
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