Final answer:
Making a decision on the spot after an accusation is not an HR best practice for terminating an employee because it lacks thorough investigation and due process.
Step-by-step explanation:
In the context of HR best practices for terminating an employee, the option that is not considered a best practice is B. Make a decision on the spot after the accusation has been made.
Human Resources professionals should conduct a thorough investigation before making a decision about an employee's termination. This includes looking at all investigation materials (A), documenting witness testimony (C), and providing outplacement information to the employee if termination occurs (D). Making a decision on the spot can lead to wrongful termination claims and suggests a lack of due process.