16.2 Capacity, Litigation Guardians & Burden/Onus of Proof at Each Stage
Key Takeaways
- Capacity to instruct is decision-specific: a client must understand relevant information and appreciate reasonably foreseeable consequences of instructing a representative on that particular matter
- Rule 7 of the Rules of Civil Procedure (mirrored by Small Claims Rule 4) requires a party under disability to proceed through a litigation guardian who has no adverse interest and whose settlements require court approval under Rule 7.08
- The plaintiff or applicant generally bears the burden of proof throughout a civil or tribunal proceeding on a balance of probabilities, while POA offences typically require the Crown to prove the act beyond a reasonable doubt before any due-diligence defence burden shifts to the defendant
- Several tribunals use shifting-burden frameworks: HRTO applicants establish a prima facie case before the burden shifts to the respondent, and WSIA section 119 gives a worker the benefit of the doubt when evidence is evenly balanced
- The evidentiary burden (pointing to some evidence) is distinct from the legal or persuasive burden (ultimately convincing the decision-maker), and confusing the two is a common analytical error
Two threshold questions decide whether a case is even ready to proceed, and who has to prove what once it does: does the client have the capacity to instruct, and who carries the burden of proof at each procedural stage. Both issues recur constantly in Small Claims, POA, and tribunal practice, and the P1 exam expects a paralegal to spot capacity concerns early and to know exactly whose job it is to prove what at every step of a file.
Capacity to Instruct
A client must have the capacity to understand the relevant information and appreciate the reasonably foreseeable consequences of instructing a representative in a legal proceeding. Capacity is decision-specific and can fluctuate — a client may be able to understand a simple retainer but not a complex settlement, or may have capacity on a good day and not on a bad one. Under the Substitute Decisions Act framework that Ontario courts and the Rules of Conduct draw on, the test focuses on functional understanding and appreciation of consequences, not on a diagnosis or label.
Rule of Conduct commentary on clients under a disability directs the paralegal to maintain, as far as reasonably possible, a normal representative-client relationship. Where capacity is genuinely in doubt, the paralegal may need to take protective steps: seeking the client's consent to involve a trusted family member or friend, requesting the appointment of a litigation guardian, or seeking direction from the court or tribunal. A paralegal must never simply take instructions from a family member instead of the client without addressing the capacity question directly.
Litigation Guardians
Rule 7 of the Rules of Civil Procedure — mirrored by Small Claims Court Rule 4 — governs "parties under disability," defined as a minor or a person who is mentally incapable within the meaning of the Substitute Decisions Act or the Health Care Consent Act with respect to an issue in the proceeding. A party under disability cannot commence, continue, or defend a proceeding except through a litigation guardian.
| Litigation guardian requirement | Purpose |
|---|---|
| Must not have an interest adverse to the party under disability | Ensures decisions serve the protected party, not the guardian |
| Consent to act must be filed with the court | Confirms the guardian understands and accepts the role |
| Court approval required for any settlement | Rule 7.08 protects against an improvident settlement being approved without independent scrutiny |
| Court may remove or replace a guardian | Preserves the protected party's interests if the guardian is unsuitable |
A settlement affecting a party under disability is not binding until the court approves it, and the court will look closely at whether the settlement is in that party's best interests, often requiring supporting evidence or a lawyer's independent opinion on the terms.
Burden of Proof and Standard of Proof
"Burden of proof" identifies who must prove a fact; "standard of proof" identifies how convincingly they must prove it. The two travel together but are conceptually distinct, and confusing them is a common exam trap.
| Forum / proceeding type | Who bears the burden | Standard of proof |
|---|---|---|
| Civil action (Small Claims, Superior Court) | Plaintiff, throughout, on the elements of the claim | Balance of probabilities |
| True criminal or POA offence requiring mens rea | Crown/prosecutor, on every element including fault | Beyond a reasonable doubt |
| Strict liability regulatory (most POA) offences | Prosecutor proves the prohibited act; then defendant may prove due diligence | Act: beyond a reasonable doubt; due diligence defence: balance of probabilities |
| Motion (e.g., to strike, for summary judgment) | Moving party | Balance of probabilities |
| Limitation period or contributory negligence defence | Defendant, once the defence is raised | Balance of probabilities |
Burden Shifting Before Tribunals
Several tribunals paralegals regularly appear before use a shifting-burden framework rather than a single fixed onus. Before the HRTO, an applicant first establishes a prima facie case of discrimination; the burden then shifts to the respondent to provide a credible, non-discriminatory explanation for the conduct. Under the Workplace Safety and Insurance Act, section 119 gives the worker the "benefit of the doubt": where the evidence for and against an issue is approximately equal, the decision-maker must resolve it in the worker's favour. At the LTB, the landlord bears the onus on an eviction application, while a tenant raising a maintenance or abatement counterclaim generally bears the onus on that counterclaim.
Key distinction: The evidentiary burden (the obligation to point to some evidence on an issue before it becomes live) is not the same as the legal or persuasive burden (the ultimate obligation to convince the decision-maker). A party can meet an evidentiary burden and still lose if the legal burden is not satisfied.
Putting It Together at the File Level
A paralegal preparing a matter for hearing should map, stage by stage, exactly who has to prove what: capacity to retain counsel or a paralegal at intake; the moving party's onus on any interlocutory motion; the plaintiff's or applicant's onus at trial or hearing on the merits; and any reverse or shifting onus that applies to a specific defence or regulatory offence. Getting this sequencing wrong — for example, opening a due-diligence defence before the prosecutor has even proven the prohibited act — wastes hearing time and can undermine the client's position with the trier of fact.
A paralegal reasonably believes their client may lack the capacity to give instructions on a settlement. What does the Rules of Conduct commentary direct the paralegal to do?
Under Rule 7.08 of the Rules of Civil Procedure, why does a settlement involving a party under disability require court approval?
In a strict liability Provincial Offences Act prosecution, how does the burden of proof typically operate?
What does section 119 of the Workplace Safety and Insurance Act mean by giving a worker the "benefit of the doubt"?