Who should not be reference?

Individuals who should not be used as references typically include former supervisors or colleagues with whom you had a negative relationship, as they may provide unfavorable feedback. Additionally, personal friends or family members may not be appropriate, as their objectivity can be questioned. It's also advisable to avoid references who are unfamiliar with your recent work or skills. Lastly, anyone who is not willing or unable to provide a positive endorsement should be excluded.