This notice is sent by the owner of a property addressed to the lessee stating that he/she does not wish to extend the existing agreement for the next period.
It is needed in case you are having issues with your current lessee or you just wish to stop leasing your property.
This notice cannot be made legally enforceable. This just serves as reference for future actions. The notice should be duly signed by the sender.
You as a lessor/owner of a property may use it to express yourwish to discontinue the ongoing agreement and want the current lessee to vacate your property at the end of the lease period.