My understanding is that it would be left blank if they don’t have an ID number.
5. License number or unique identifier. Section 1026.38(r)(3) and (5) requires the disclosure of a license number or unique identifier for each person (including natural persons) identified in the table who does not have a NMLSR ID if the applicable State, locality, or other regulatory body with responsibility for licensing and/or registering such person’s business activities has issued a license number or other unique identifier to such person under § 1026.38(r)(3) and (5). The space in the table is left blank for the disclosures in the columns corresponding to persons who are not subject to the issuance of such a license number or unique identifier to be disclosed under § 1026.38(r)(3) and (5); provided that, the creditor or settlement agent may omit the column from the table or, if necessary, replace the column with the contact information for an additional person.