Quick tool to help generate the ULI checksum and validate existing ULI.
See CFPB documents: Appendix C to Part 1003 - Procedures for Generating a Check Digit and Validating a ULI http://www.consumerfinance.gov/eregulations/1003-C/2015-26607_20180101#1003-C-1 1003.4 Compilation of reportable data. http://www.consumerfinance.gov/eregulations/1003-4/2015-26607_20180101#1003-4-a