Old field files surface mid-lawsuit against a Thunder Bay surveyor

The situation

By the time the old boxes turned up, Lorna had already spent most of a year defending her professional judgment. She had answered a demand letter from Kerem's lawyer with a written explanation of her methodology. She had produced her active file, the survey plan, and her correspondence with Kerem from the time of the original boundary opinion. She had sat for an examination for discovery and answered every question about her process, her instruments, and the reference monuments she had relied on. None of it had ended the claim.

Kerem, who had purchased a rural property outside Thunder Bay years earlier, was suing Lorna's survey practice for roughly $225,000, alleging her boundary opinion had been wrong and had cost him a fence dispute and legal fees with a neighbour. Lorna maintained her opinion had been correct based on the monuments and reference points available to her at the time. The dispute had narrowed, over months of pleadings and discovery, to a single factual question: what evidence had actually existed to support the boundary line she drew.

Grace, Lorna's office manager, had been quietly working through a backlog the firm had been putting off for years. A storage unit the practice had rented since before Grace started held decades of retired field books, old chain-of-title notes, and survey files that predated the office's digital record-keeping. Grace was sorting the unit for a lease renewal, not for the lawsuit, when she found a box of field notes with Kerem's property address on the label.

The notes were from an earlier survey of a neighbouring parcel, done by the same firm under a previous principal, years before Lorna's own opinion. They referenced a monument that matched the line Lorna had drawn. Grace recognized the address and called Lorna immediately. The problem was timing: the court had already set a firm date, not subject to further adjournment, for the parties to finalize their trial record. There were only a few weeks left, and the material that might settle the whole case had just appeared in a box nobody had opened in years. Lorna's first instinct was relief, followed almost immediately by worry about whether it was too late in the case to do anything useful with what Grace had found.

The legal question

Once a party serves an affidavit of documents in a lawsuit, they are not finished with their disclosure obligations. If additional relevant material comes into their possession or control after the original affidavit was served, the party is required to disclose it through a supplementary affidavit, even late in the litigation and even if it helps their own case rather than the other side's. The obligation is ongoing, not a one-time filing made at the start of the case and forgotten.

This matters for two reasons that pulled in different directions for Lorna. The first is that failing to disclose newly found relevant documents, even inadvertently, can expose a party to real consequences: the material can be excluded from use at trial, costs can be awarded against the party who sat on it, and a court can draw an unfavourable inference about why it was held back. The second is that disclosing favourable evidence late, close to a fixed trial date, invites the other side to argue it should not be allowed in at all, on the basis that they have not had time to respond to it.

The legal question was not whether Lorna had to disclose the field notes. She did, and delaying or downplaying them was never a serious option. The question was how to disclose them in a way that would survive a challenge from Kerem's counsel that the material was coming in too late to be fair, while still meeting the deadline the court had already fixed for finalizing the trial record.

There was also a substantive question underneath the procedural one: did the old field notes actually say what Grace thought they said. A survey reference from a prior job, done by a different surveyor for a different client, is not automatically relevant just because it mentions a nearby monument. The notes needed to be read carefully against Lorna's own file to establish that they genuinely supported her boundary opinion, rather than simply looking helpful at first glance.

There was a further wrinkle particular to survey work. A boundary opinion is judged, in part, against what a reasonably competent surveyor would have relied on at the time it was given, using the evidence that was reasonably available. Lorna's opinion had to be defended on the record as it existed when she formed it, not on a record improved years later by a lucky discovery in storage. The newly found notes could not retroactively justify a conclusion Lorna had not reached that way; at most they could corroborate that the monument she identified was a real, previously documented reference point, supporting that her original methodology had been sound rather than simply lucky.

What we did

1. Reviewed the found material against Lorna's original opinion the same day it surfaced. Before treating anything as significant, we needed to know whether the field notes actually corroborated the monument Lorna had relied on or merely referenced the same general area. We compared the coordinates and descriptions in the old notes directly against Lorna's working file to confirm the overlap was real and specific, not coincidental.
2. Confirmed the notes were within Lorna's control and had to be disclosed regardless of how they affected her case. The rule requiring supplementary disclosure does not turn on whether the party wants the material known. We treated the discovery as an obligation first and a strategic opportunity second, which also meant we could tell opposing counsel truthfully that disclosure had been immediate.
3. Prepared a supplementary affidavit of documents within days, not weeks. Given the immovable deadline, we could not afford the drafting delays a matter like this would normally tolerate. We worked directly with Lorna and Grace to document exactly how and when the material had been found, which mattered for credibility if the timing was later questioned. The affidavit listed each newly found document, explained how it had surfaced, and confirmed the rest of the storage unit had been checked, so nothing else could turn up later and undercut the disclosure.
4. Notified opposing counsel promptly and in writing, rather than waiting to serve the formal affidavit. An early heads-up gave Kerem's lawyer more practical time to consider the material, which reduced the strength of any later argument that the late disclosure was unfair or prejudicial. It cost us no advantage to be transparent, and it removed a procedural objection before it could be raised.
5. Arranged for the original field notes to be authenticated. Because the documents predated Lorna's time at the firm, we needed someone who could speak to how the firm's older records were created and stored, to avoid a challenge that the notes could not be reliably tied to the date or the surveyor who made them. We located a retired colleague of the firm's previous principal who could describe the record-keeping practices of that era, and arranged for that person to be available if Kerem's counsel challenged the notes' authenticity.
6. Requested an updated examination for discovery limited to the new material. Rather than reopening the whole case, we proposed a short, targeted follow-up discovery focused only on the field notes, which let Kerem's counsel test the evidence without derailing the trial date. This cooperative approach mattered to how the court later viewed the disclosure, and it meant neither side had to argue over scope, which would have burned time neither of them had before the fixed date arrived.
7. Prepared Lorna to explain the discovery process itself if asked at trial. We anticipated that opposing counsel might try to suggest the timing looked convenient. Lorna needed to be ready to describe plainly how the storage unit review happened, when Grace called her, and what steps followed, so the sequence read as ordinary office housekeeping rather than anything engineered. We rehearsed the account with her in plain, chronological terms, since a witness who overexplains a lucky break can sound less credible than one who simply describes what happened and when.
8. Coordinated timing with the court's own scheduling requirements. A firm trial date meant every filing had a hard deadline behind it, so we mapped each step against the calendar in advance, from serving the supplementary affidavit through completing the limited follow-up discovery, to make sure none of the individual pieces slipped and put the trial date itself at risk. We built in a buffer around the authentication step specifically, since it depended on someone else's availability and was the piece of the plan most likely to slip.

The outcome

The supplementary affidavit was served with more than enough time left before the fixed deadline, and Kerem's counsel did not bring a motion to exclude the material. There was some pushback in correspondence, an argument that the timing was suspicious given how close the case was to trial, but it never developed into a formal motion, in part because our early written notice to opposing counsel had already undercut the argument that the disclosure had caught anyone off guard. The targeted follow-up discovery went ahead on schedule, and the authenticated field notes held up under questioning: they specifically referenced the same monument Lorna's opinion had relied on, from a survey done years before the dispute arose, by a different surveyor with no reason to favour either side.

Faced with corroborating evidence that predated the entire dispute and came from an independent source within the same firm's own historical records, Kerem's position weakened considerably. His counsel asked for extra time within the existing schedule to consider the new material properly, a scramble that fell on the other side, not Lorna, for once. Rather than proceed to trial, the parties resolved the claim on terms favourable to Lorna, with Kerem discontinuing the action entirely and each side bearing its own costs to that point, which was a materially better outcome than a contested trial risked, both in dollars and in the months a trial would have added to a case already a year old.

The case did not turn on a clever legal argument. It turned on Lorna and Grace treating an inconvenient discovery as an obligation to meet quickly and honestly, rather than a complication to manage quietly or hope would go unnoticed. The immovable deadline that had looked like the biggest threat in the case became manageable once the disclosure was made promptly and the process behind it was documented clearly enough to withstand scrutiny. Lorna kept her professional record clear of any adverse finding, which mattered to her ongoing survey practice well beyond the dollar value of the claim itself, and the storage unit that had sat untouched for years is now catalogued as part of the firm's regular file management.

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