The rule that an outsider dealing with a company is entitled to assume that the company's internal requirements of management have been duly complied with, as laid down in the Royal British Bank
v. Turquand rule, is known as the doctrine of:

The doctrine of 'indoor management' (the Turquand rule) protects outsiders who contract with a company in good faith by presuming that the company's internal procedures - such as authorisation by resolution or the grant of a particular authority - have been regularly complied with. It complements the doctrine of constructive notice of public documents, which fixes outsiders with notice of the registered memorandum and articles. The rule, however, does not protect an outsider who acts without inquiry in a suspicious circumstance or who has notice of irregularity. Its exceptions include forgery, illegality and situations where the outsider is himself an officer of the company.