Workplace investigations take place to gather, establish and assess the facts surrounding a grievance or disciplinary issue. Whilst they are not part of the formal disciplinary hearing, they are an important part of the process before making a determination as to whether to proceed to a disciplinary hearing.

Procedural deficiencies in an investigation process could lead to an unfair dismissal claim. Employment Tribunals expect employers to show they have conducted careful and fair investigations where complaints are made by or about employees.