What is necessary to request mailing addresses for licensure?

Requesting mailing addresses for licensure requires specifying the type of licensure list that is being requested. This is because different types of licensure may apply to various professions or trades, and the relevant authorities maintain distinct records for each type. When making a request, it's essential to clarify which specific group of licensees you are interested in, as this directly affects the data retrieved and ensures that the information aligns with the purpose of the request.

In contrast, the other options do not directly pertain to the requirement for requesting mailing addresses. The type of employment, candidates' work history, and criminal history check may be relevant in other contexts, such as assessing qualifications or background evaluations for licensure, but they are not necessary factors for simply obtaining mailing addresses related to licensure. Thus, the correct answer identifies the specificity of the licensure type as the key factor in the request.