To terminate a rental agreement, you must inform the landlord or real estate agency in advance by a period stipulated in your contract. This is known as the termination notice. Generally, the notice must be given 1 to 2 months prior to the termination date, and some contracts require it to be in writing. Failing to submit the termination notice within the required period may incur you a penalty equivalent to one month's rent. Always confirm the termination notice period when entering into a rental agreement.