Liability, the obligation to compensate someone else for loss or damage, is a major concern for architects. The main types of architects' liability are breach of the client-and-architect agreement (which is a breach of contract) and the tort of negligence (professional negligence). Usually claimed alongside it is breach of the Commonwealth Competition and Consumer Act 2010 or the equivalent under state/territory Fair Trading Acts. Other types of liability include breach of copyright and defamation.