An OTB notice is a letter sent by the Canada Revenue Agency (CRA) to eligible Ontario residents informing them of their status with respect to the Ontario Trillium Benefit (OTB) . The OTB is a refundable tax credit that combines three tax credits: the Ontario energy and property tax credit, the Northern Ontario energy credit, and the Ontario sales tax credit. The notice may inform you that youve been approved for benefits, need to pay back a certain amount, or explain an increase or decrease to your benefit payments. There are many reasons why you may have been sent an OTB notice, including simple updates on your OTB application status, notice of general changes to OTB benefit payments, notice that you owe money back to the CRA due to changes in eligibility, and request for information needed to assess your OTB eligibility. If you receive an OTB notice, it is important to read it carefully and see if the information is correct and if any action is required from you. You can log into your CRA MyAccount to view more information or call the CRA for assistance.