Harland Clarke's Enhanced Security Level- The Highest Standard of Check Security Available
After extensive analysis of current check fraud problems and trends, Harland Clarke introduced the Enhanced Security Level (ESL) standard. ESL is our highest standard level of check security available and exceeds the current industry standard adopted by the Check Payment Systems several years ago. Best-in-class features of ESL include:Security Weave® background design which greatly improves the current security screen's level of protection against photocopying. Additionally, ESL includes an updated warning box (in an obvious position on the back) with instructions. The message warns criminals and alerts authenticators to the existence of added security features on the check.
imageSafe® - imageSafe is a personal check design that incorporates all standard features and also includes fugitive ink on the front and back of the check. Additionally, the front of this basic blue check includes a warning message box at the top edge:
Look for: Blue border on the front and imageSafe logo in light
gray tones on the back. If not present - Do Not Cash.
gray tones on the back. If not present - Do Not Cash.
As noted in the warning message box, the back has a repeating imageSafe logo.
En Garde® Security Features -This business check integrates all the features of ESL along with additional security features such as fibers that fluoresce in UV light, colored fibers, an embedded watermark and a unique 3-D security pattern. This design is available in our popular Three-to-a-Page and Computer Check series of products.
ESL utilizes a process patented by Harland Clarke that combines fugitive ink to combat chemical alteration and anti-counterfeiting designs to deter copying, scanning and duplication. This new layer of protection makes counterfeiting and alteration more difficult, adds greater deterrent value to our checks, and therefore more security against check fraud.
ESL-added features include fugitive ink on the back that prevents chemical alteration of a specific area on the front of the check. Attempts to chemically alter this area will cause discoloration while severely distorting or erasing the same area on the back of the check.


