An expert banking witness gives testimony in court cases that are brought against banks. They typically have worked for a number of different banks and have held wide-ranging roles within various bank departments. They may have acted, for example, as managers, compliance officers, customer relationship managers or have been responsible for responding to customer complaints.

They are able to give disinterested evidence in a case based on their wide knowledge and experience of banking best practice and the legal and regulatory requirements that apply to banks. They can be hired by both the plaintiff or the respondent to give their honest opinion of the subject of a given court case without being beholden to either party or having a personal interest in the outcome of the case. Banks have been subject to increased scrutiny since the mortgage collapse of 2007 and expert witnesses can be called to determine whether a bank acted fairly.