Not having the option to easily visually identify the company type from the DIOT fields as mandatory (field borders in red), user may not easily visually identify the consequences while entering the RFC. (Federal Tax ID).

Currently the company type is not displaying as mandatory, user may identify the company type as mandatory while entering a RFC with no company type from the DIOT field grouping.

Flagging and displaying the company type as mandatory while user attempts to enter the RFC, user may easily identify the potential error when not selecting company type from the drop listings.