Execution of bills of exchange: company acts by authorised persons bind the company when made under the company's authority. A bill of exchange, hundi or promissory note is deemed executed on behalf of a company when made in the company's name or on its account by a person acting under the company's express or implied authority. A company may authorise in writing an attorney to execute deeds generally or for specified matters under the company's common seal; if no common seal exists the authorisation must be made by two directors or by a director and the company secretary. A deed signed by such an attorney under his seal binds the company pursuant to the authorisation.