Which of the following is NOT a requirement for obtaining a certificate of identification?

The requirement for obtaining a certificate of identification is primarily aimed at ensuring that the applicant has the necessary background and qualifications for practicing in the field of cosmetology.

Holding a current cosmetology license signifies that the applicant has completed the requisite education and training in cosmetology, which demonstrates their competency in the field. Documentation of employment in a licensed salon adds further credibility, showing that the applicant has practical experience in a professional setting. Attesting to service delivery in health facilities is important as it can highlight additional qualifications or specialties in providing services that may impact the health and safety of clients.

While completion of a written exam is a common component of licensing processes in various professional fields, it is not a requirement specifically tied to the certificate of identification in Minnesota's cosmetology laws and rules. Thus, it is the only option among the choices that does not align with the requirements established for obtaining this particular certification.