RFC and CURP for Mexican vendors

Question

Hello, I would appreciate you can provide any comments  about Master data for Mexican customers/vendors.
In Mexico companies and organizations have a Tax registration number called RFC which is ABC680504BV1 which contains 12 length characters
The field for storing this information in SAP master vendor record is in field TAX NUMBER 1. Table-field: LFA1-STCD1
However in Mexico the natural persons, independent professional persons, have a Tax registration record called CURP which is 13 length characters. Example PIIG720116BV1
If I try to store the CURP in the field TAX NUMBER 1. Table-field: LFA1-STCD1 from the SAP master vendor I get and error message.
In fact the recommendation of SAP is to store the CURP in the field called TAX NUMBER. Table-field: LFA1-STENR and to check the box NATURAL PERSON 
However in most of the reports the field TAX NUMBER is not available for displaying information. I am thinking to store the RFC and CURP in the field called VAT Registration number which is available in most of the reports and there is not any check in this field.
I would appreciate if somebody can provide any comments
Thanks

Answer 1

Hi,
     The CURP should be entered in Tax Number 3   (STCD3).
Tax Number 3
Specifies the tax number.
Use
Enter the tax number that applies:
Country Tax number
Argentina Withholding agent number
Brazil State tax number
Bulgaria Social security number
Mexico CURP number
Netherlands Tax registration number (Loonbelastingnummer) of the chain-liability vendor
Russia KPP number
Ukraine VAT registration number
Kind regards