Simply replace the unfilled areas such as "[]" and "[date]" with your information.
Dear [name],
Re: [30/60/90] day Notice Termination of [Rental/Lease] Agreement
Address: [Premises]
Please let this serve as official [30/60/90]-day written notice from [name of Company], advising that, effective [date], we will not longer be [Renting/Leasing] the above mentioned [building/unit/bay/suite/apartment/etc.]. We are exercising our right to terminate the [Lease/Rental Contract/Agreement] based on the following condition:
1) [List the term/condition] - description of condition as worded in the [Lease/Rental Contract/Agreement].
2) [List the term/condition] - description of condition as worded in the [Lease/Rental Contract/Agreement].
In the event you need to contact us regarding this matter, I ask that you contact our management at [phone #]. Below you will find the forwarding address where we can be reached to satisfy all amounts owing. Trusting you will find all to be in order.
Yours truly,
[your name]
[your address]