Can I find out if a business has any undisclosed guarantees backing someone else's debt?

It's genuinely difficult to uncover through a standard search, and this is one of the trickier gaps in business due diligence. A guarantee — where the business or its corporation has agreed to be responsible for someone else's loan or obligation, such as an affiliated company's financing, a franchisor's debt, or a director's personal borrowing — doesn't always show up in a straightforward corporate or lien search, since the guarantee itself is often just a contract, and it's the underlying lender's security (if any) that gets registered, not necessarily the guarantee.

This matters enormously if you're buying shares, since a share sale brings the corporation's contingent liabilities with it, including a guarantee that's never been called on but could be in the future. It matters less in a clean asset purchase, where liabilities not expressly assumed generally stay with the seller, but it still affects your assessment of the seller's overall financial health and reliability.

Ask the seller directly, and in writing, whether the business has guaranteed any third party's debt, and get a specific representation and warranty on this in your purchase agreement, since a search alone may not catch it. A Treadstone business lawyer can help draft representations that address exactly this gap.