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As my colleagues stated in the previous post, validating a set of unique ID's, as referenced in the previous post, is not possible without actually entering each ID manually. There is no way to check the ID's versus a database inherently in JotForm. You can manually enter each and have them checked by conditions, as stated in the previous post, but that is about the extent of what is possible.
Let us know if you have any further questions and we will be happy to help.