The furor over NatWest Group’s decision to monitor and close the account of right-wing Brexit campaigner Nigel Farage—and then disclose the details to a journalist—has raised questions regarding whether other banks employ the same means to get rid of undesirable customers.

Neil Hodge is a freelance business journalist and photographer based in Nottingham, United Kingdom. He writes on insurance and risk management, corporate governance, internal audit, compliance, and legal...