Ontario unpaid invoice: can a small business use Small Claims Court?

Yes, if the claim fits the court’s jurisdiction. Ontario Small Claims Court can hear claims for money or personal property up to $50,000, excluding interest and costs. A business chasing an unpaid invoice should keep the contract or quote, invoice, proof of supply, payment reminders and correspondence. Official source: Ontario Ministry of the Attorney General. Guide: https://getinstantlaw.com/small-business/customer-wont-pay-invoice