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what is the equipment to print the OVI ? because we need to print the OVI on cheques .
You're not going to get it. I believe they control who they sell this ink to, and generally only sell to governments and central banks (based on the SICPA website referenced in the article). DanTheStone (talk) 17:39, 13 January 2012 (UTC)
This page should probably also mention that many ID cards and passports use this as a security feature. I know the USA Passport and Passport Card do, for example. New USA Social Security Cards do, too. (See version 27 at the Social Security website. http://www.ssa.gov/history/ssn/ssnversions.html ) DanTheStone (talk) 17:39, 13 January 2012 (UTC)