Section 215 in The Indian Contract Act, 1872
Title: Right of principal when agent deals, on his own account, in business of agency without principals consent.
If an agent deals on his own account in the business of the agency, without first obtaining the consent of his principal and acquainting him with all material circumstances which have come to his own knowledge on the subject, the principal may repudiate the transaction, if the case shows, either that any material fact has been dishonestly concealed from him by the agent, or that the dealings of the agent have been disadvantageous to him.
(a) A directs B to sell A's estate. B buys the estate for himself in the name of C. A, on discovering that B has bought the estate for himself, may repudiate the sale, if he can show that B has dishonestly concealed any material fact, or that the sale has been disadvantageous to him.
(b) A directs B to sell A's estate B, on looking over the estate before selling it, finds a mine on the estate which is unknown to A. B informs A that he wishes to buy the estate for himself, but conceals the discovery of the mine. A allows B to buy, in ignorance of the existence of the mine. A, on discovering that B knew of the mine at the time he bought the estate, may either repudiate or adopt the sale at his option.
Title: Principal's right to benefit gained by agent dealing on his own account in business of agency
If an agent, without the knowledge of his principal, deals in the business of the agency on his own account instead of on account of his principal, the principal is entitled to claim from the agent any benefit which may have resulted to him from the transaction.
A directs B, his agent, to buy a certain house for him. B tells A it cannot be bought, and buys the house for himself. A may, on discovering that B has bought the house, compel him to sell it to A at the price he gave for it.
Title: Agent's right of retainer out of sums received on principal's account.
An agent may retain, out of any sums received on account of the principal in the business of the agency, all moneys due to himself in respect of advances made or expenses properly incurred by him in conducting such business, and also such remuneration as may be payable to him for acting as agent.
Title: Agent's duty to pay sums received for principal.
Subject to such deductions, the agent is bound to pay to his principal all sums received on his account.
Title: When agent's remuneration becomes due.
In the absence of any special contract, payment for the performance of any act is not due to the agent until the completion of such act; but an agent may detain moneys received by him on account of goods sold, although the whole of the goods consigned to him for sale may not have been sold, or although the sale may not be actually complete.