Unless there is a special clause stating differently in your lease, there are no specific requirements for how to deliver this form. You can even hand it to your landlord personally. To have legal proof that he or she received the notice, however, it’s usually best to choose certified mail. This way your landlord has to sign a document stating that they received the letter. This proof of delivery also shows the date the letter was received, so you can prove you followed the law’s requirements.