A new survey has found widespread corruption in the legal profession around the world and serves as a stark reminder to companies about the potential risks posed by outside advisers.

Nearly half of 642 lawyers in 95 jurisdictions around the world surveyed by the London-based International Bar Association said corruption was a problem in their locale. One-third of the respondents said a lawyer they know has been involved in international corruption, and more than one in five said they have or may have been approached to take part in a transaction that could reasonably be suspected to involve international corruption.

Gonzalo Guzman, ...