Which of the following can be considered a form of professional reprimand?

A warning from a supervisor qualifies as a form of professional reprimand because it involves an official communication regarding an employee's behavior or performance that is deemed unsatisfactory. This type of warning typically occurs after a specific breach of conduct or failure to meet job expectations and serves to inform the employee that there may be consequences if the behavior continues. The goal of such a reprimand is to correct the issue and guide the individual towards better performance, making it a formal mechanism within workplace discipline.

In contrast, a financial penalty might impose a monetary consequence but does not necessarily involve direct feedback or redirection from a superior, thus lacking the instructional element of a reprimand. Public notification of misconduct can certainly reflect a serious issue, but it may not constitute a traditional reprimand as it often lacks the private, corrective intent associated with supervisor warnings. A suggestion for improvement, while potentially beneficial, does not carry the weight or formality of a reprimand and is generally more positive and constructive rather than disciplinary in nature.