Burn After Reading is a black comedy spy movie by the Coen brothers. It could also be an extreme encapsulation of the core of data retention rules applicable to communications providers: data should only be kept for as long as:
- There is an administrative need to keep it to carry out your business or support functions (e.g. billing); or
- It is required to demonstrate compliance for audit purposes or for legislative requirements (e.g. in case of an order to intercept communications for law enforcement).