Limitations on the Scope of the Doctrine -

1. Rescue Cases

The rescue cases principle is an important exception to volenti non fit injuria.
If a defendant’s wrongful act creates danger, a person who is injured while reasonably rescuing another is not considered to have voluntarily accepted the risk.
The law protects rescuers and holds the original wrongdoer liable for injuries suffered during a necessary and foreseeable rescue attempt.

Haynes v. Harwood established the rescue exception to the doctrine of volenti non fit injuria.
The defendant negligently left a horse van unattended, creating a dangerous situation, and a police constable was injured while trying to stop the runaway horses and protect the public.
The Court held that a rescuer who acts in response to a real and immediate danger does not voluntarily assume the risk, so the defence of volenti non fit injuria is not available.
However, this protection applies only when the rescue is necessary and the danger is genuine, not when there is no actual emergency.

Wagner v. International Railway firmly established the rescue exception to the doctrine of volenti non fit injuria.
The railway company’s negligence caused a passenger to fall from a moving train, and his companion was injured while attempting to rescue him.
Justice Cardozo famously observed that “danger invites rescue,” meaning that a rescuer’s actions are a natural and foreseeable consequence of the defendant’s negligence.
Therefore, the law does not treat the rescuer as someone who voluntarily accepted the risk, and the original wrongdoer remains liable for the injuries suffered during the rescue.

Baker v. T.E. Hopkins & Son established that a rescuer who knowingly faces danger to save others is not barred by the defence of volenti non fit injuria.
Although Dr. Baker was warned about the poisonous fumes in the well, he entered to rescue the trapped workers and died.
The Court held that rescuing human life is a natural and foreseeable response to the defendant’s negligence, not a voluntary acceptance of risk.
Therefore, the original wrongdoer remained liable for the injuries and death of both the victims and the rescuer.

Section 2 of the Unfair Contract Terms Act, 1977 introduces a powerful statutory control over tort law by ruling that contractual waivers and public liability notices cannot be used as absolute shields against negligence.
When technical jurisprudence is merged with everyday reality, we see that
sub-section (1) places an absolute ban on protecting defendants from liability regarding death or personal injury, meaning a person’s physical safety cannot be legally signed away in a waiver.
For property damage, sub-section (2) permits liability limits only if they meet a strict requirement of reasonableness,
sub-section (3) prevents a defendant from automatically using the volenti defense just because a plaintiff saw a disclaimer sign.
That statutory law actively overrides unfair contracts: it keeps the defendant strictly accountable for physical harm, subjects property disclaimers to judicial fairness tests, and demands independent proof of true, voluntary consent rather than relying on standard fine print.