A supplier's second lesson about guarantees that were never released in writing

The situation

Iryna noticed the account balance before she noticed anything else. It was a Tuesday morning routine, checking overdue receivables on her supply company's ledger, when she saw that a long-standing customer's account had climbed past 480,000 dollars in unpaid materials, well beyond the credit limit her office normally allowed. She called the customer's principal, Pooja, expecting an ordinary conversation about a payment plan.

Instead, Pooja told her the debt was not really Pooja's problem to solve personally, because the personal guarantee Pooja had signed years earlier to secure the account had been released in a phone call with one of Iryna's staff members roughly a year before. No email, no letter, nothing in the file to confirm it. Pooja was adamant it had happened and seemed genuinely surprised that Iryna's office would treat the guarantee as still active.

Iryna's supply business had extended trade credit to Pooja's construction company for years, and the relationship had generally been smooth, which was part of the problem. Because Pooja had been a reliable, long-term customer, Iryna's office had grown comfortable letting invoices run further than they should have and had stopped insisting on the kind of written confirmations that used to be standard practice for any change to an account's terms.

This was not the first time Iryna had faced a guarantee dispute. Two years earlier, after a smaller account went bad, we had advised her office in writing that any release, amendment, or informal accommodation involving a personal guarantee needed to be confirmed in writing before her staff treated it as effective, precisely because verbal claims like Pooja's are difficult for either side to prove and easy for a debtor to raise once a balance grows large. That advice had not made it into her office's day-to-day practice, and this account showed exactly why it mattered.

When Iryna called us again, she was candid about what had happened in the meantime: the recommendation had been discussed at the time, agreed with in principle, and then quietly not implemented, because nothing had gone wrong for two years and the pressure to change how staff processed routine account calls had faded along with the memory of the earlier dispute. There was no written policy, no training note, nothing that would have stopped a staff member from taking a call from a long-standing customer's principal and treating a friendly conversation as more significant than it actually was, if that conversation had happened at all.

What the law actually said

A personal guarantee is a separate written promise, distinct from the underlying trade account, by which an individual agrees to personally cover a business debt if the business itself does not pay. Because it is a formal written undertaking, Ontario courts generally require clear evidence to establish that it has been changed or released, and an unwritten, unconfirmed conversation carries very little weight against a signed document, particularly where the guarantee itself specifies that changes must be in writing, as Pooja's did.

Pooja's account of the phone call, even if given in good faith, faced a basic evidentiary problem: there was no record of it anywhere, no follow-up email, no notation in Iryna's account file, and no change made afterward to how the account was actually managed, such as a reduced credit limit or a request for alternative security. Courts look for that kind of corroborating conduct when assessing a claimed release, because a genuine release usually changes how both sides behave going forward, not just how one side remembers a conversation years later.

The staff member Pooja named, Meera, had left the company by the time the dispute arose, which made her account harder to obtain directly but did not change the underlying legal analysis. Even if Meera had said something informally reassuring on a call, an ordinary employee generally does not have the authority to release a guarantee that had been personally negotiated and signed at the ownership level, unless the guarantee itself or the company's own practices gave her that authority, which nothing in Iryna's records suggested.

The practical result was that the burden sat heavily on Pooja to prove the release had happened on terms that would actually bind Iryna's company, not simply that a conversation along those lines had occurred. Absent a written confirmation, a changed course of dealing, or some other objective corroboration, the original written guarantee remained the operative document.

What we did

1. Pulled the complete account file, including the original guarantee, the credit application, and every invoice and payment record going back to the account's opening, to establish precisely how the debt had accumulated and to confirm, methodically rather than from memory, that no formal amendment to the guarantee existed anywhere in Iryna's paper or electronic records. A claimed release is easiest to defeat by showing what is absent, and we needed to be confident we had actually looked before making that representation.
2. Interviewed Iryna's current staff about how the account had actually been managed month to month, confirming that credit limits, collection follow-ups, and payment terms had continued exactly as before after the date Pooja claimed the release occurred. We asked this deliberately because a genuine release almost always changes behaviour on both sides going forward, and the absence of any such change became one of the strongest pieces of circumstantial evidence undercutting Pooja's account of events.
3. Attempted to locate Meera, the former staff member Pooja named as the person who supposedly granted the release, to get her account of the alleged phone call directly rather than relying on Pooja's characterization of it secondhand. We judged this worth the effort because either a clear denial or a vague, non-committal recollection from Meera would meaningfully affect how much weight a court would eventually give to Pooja's version of the conversation.
4. Sent a formal demand to Pooja that quoted the written guarantee's own amendment clause directly, rather than simply asserting the debt was owed, so that Pooja's own signed document would be doing the work of putting Pooja on notice that an unconfirmed verbal claim would not be treated as sufficient to avoid personal liability. This framing was chosen specifically to force an early, realistic conversation with Pooja's counsel about the strength of the position.
5. Prepared and issued a claim against both the construction company and Pooja personally under the terms of the guarantee once the demand went unanswered within the time we had given, preserving our ability to recover from either the business or Pooja individually depending on which one turned out to hold recoverable assets by the time judgment or settlement was reached.
6. Obtained a sworn affidavit from Iryna's office manager setting out the account's complete history in chronological detail and confirming, under oath, that no record existed anywhere of any release conversation, written or otherwise. This became the central evidentiary anchor for the claim, because it converted what might otherwise have been treated as a swearing contest between two witnesses into a documented, verifiable account of how the file had actually been kept.
7. Negotiated a resolution once Pooja's own counsel had reviewed the account history and the guarantee's written-amendment clause and recognized that the unconfirmed verbal claim was unlikely to survive a motion, let alone a trial. We used that leverage to secure payment in full rather than a discounted settlement, since the evidentiary gap in Pooja's position left little room for a meaningful compromise on the principal amount owed.

The outcome

Pooja's position did not survive contact with the account records. Once Pooja's own lawyer reviewed the guarantee's requirement that amendments be in writing, alongside the fact that the account had continued to be managed exactly as before the claimed release, the claimed verbal release stopped being a viable defence. Pooja's construction company and Pooja personally agreed to pay the full outstanding balance, roughly 480,000 dollars, on a structured schedule over ten months rather than contest the claim through trial.

Iryna recovered the debt in full, along with reasonable costs of pursuing the claim, though the structured payment schedule meant the last installment did not arrive until nearly a year after the original demand. The business relationship between the two companies did not survive the dispute, and Pooja's account was closed once the balance was paid. Neither side pretended the relationship could continue on the old informal footing after a claim had actually been issued, and Iryna's office treated the closure as the correct outcome rather than a loss worth mourning.

Inside Iryna's own company, the episode finally produced the change we had recommended two years earlier: every account with a personal guarantee now requires any change, release, or accommodation to be confirmed in a signed letter before staff treat it as effective, with that requirement printed directly on the guarantee form itself rather than left as an internal policy nobody consistently followed. Iryna also asked us to run a short training session with her account staff, walking through exactly what had gone wrong and why a friendly phone call is never a substitute for a written confirmation, so the lesson would sit with the people actually answering the phones rather than only with the owner who had heard it twice now.

What you can learn from this