MWST/TVA/IVA CH 6 digits (up to 31 December 2013). CHE 9 numeric digits plus TVA/MWST/IVA e.g. CHE-123.456.788 TVA The last digit is a MOD11 checksum digit build with weighting pattern: 5,4,3,2,7,6,5,4: Turkey Vergi Kimlik Numarası VKN TR 10 digits Digits can be any number between 0 and 9.

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