A RIN is a unique 9-digit number identifying a business requesting registration of vehicles and/or plates with the Ministry. To be eligible to receive a company RIN an organization must be either an Indian Band or incorporated. To get a RIN, change the name or address of a business with an existing RIN, or merge two RINs, an organization must provide original identification documents, complete this form and provide two (2) proof of address documents at a ServiceOntario Centre.