What does it mean to register a security interest under the PPSA in Ontario?

Registering a security interest under Ontario's Personal Property Security Act means filing a financing statement in the province's public electronic PPSA registry, identifying the debtor, the secured party, and a description of the collateral involved. It's a notice-style filing — the underlying loan agreement or security agreement itself isn't filed or made public, just a record that a security interest exists.

Registration is generally what "perfects" a security interest, making it effective not just between the lender and the borrower, but against third parties, including other creditors and, importantly, a bankruptcy trustee if the corporation becomes insolvent. Because Ontario's PPSA priority rules generally run on a first-to-register basis, the exact date and time a financing statement is filed can determine who gets paid first if multiple creditors have claims against the same collateral. This is why lenders register promptly, often before or at the same time as advancing funds, rather than waiting. If you're a business owner granting security, understand that this registration becomes a public record searchable by anyone, including future lenders and potential buyers of your business's assets.