Complaints against a taxi driver can come from customers, members of the public or other taxi drivers. These complaints can, for example, relate to improper personal behaviour, using abusive language, erratic or improper driving, breaking licence conditions and rules, and for overcharging.

Complaints are dealt with initially by the Taxi Inspector and where serious complaints are upheld, details may be passed to the Local Authority Licensing Board for consideration. Where disciplinary action is considered necessary, the driver may be suspended from work until a hearing is called. Any disciplinary procedures will be in accordance with the conditions laid down by the local licensing authority.