Not very is the answer. When I worked in finance in the UK a few years back, the credit control team had a few ex-commercial bankers. Those guys had wild storie

Not very is the answer. When I worked in finance in the UK a few years back, the credit control team had a few ex-commercial bankers. Those guys had wild stories, the best ones were usually how much money they'd find being added to children's accounts for "birthday gift money". Usually with certain groups who have traditionally large families, the children would all have regular four and five figure cash lodgements.