Real-estate broker Tatiana Londono has taken responsibility for the actions of her former assistant – a broker who falsified a client’s signature on contracts to sell two Westmount apartments in 2008 and 2009.The head of Londono Realty Group said she didn’t know her assistant had forged the signature of the Montreal businesswoman who’d once been her regular client.But since the listings were in Londono’s name, the founder of a Montreal agency with more than 100 brokers acknowledged she should have better “supervised” the ex-employee.“I have taken steps to improve the system of control at my office to ensure that this never happens again,” Londono told a disciplinary committee of the Organisme d’Autoréglementation du courtage immobilier du Québec, or OACIQ, on Monday.The OACIQ, which was created...