The classic definition

A confession must either admit in terms the offence, or at any rate substantially all the facts which constitute the offence.

An admission of a gravely incriminating fact — even a conclusively incriminating fact — is not of itself a confession.

📖 Sahadevan v. State of Tamil Nadu, (2012) 6 SCC 403

Facts: A conviction rested substantially on an extra-judicial confession said to have been made by the accused to a witness, and the Supreme Court considered the weight such evidence carries and the conditions on which it may be acted upon.

Held: The Supreme Court held that an extra-judicial confession is a weak piece of evidence and must be received with great care and caution, and set out the principles governing its use. Such a confession should be made voluntarily and should be truthful; it should inspire confidence; and the court should be satisfied that it is trustworthy, having regard to the credibility of the witness to whom it is said to have been made. The Court held that the words of the confession should be clearly proved, and that where the witness gives only the substance in his own words, its terms cannot properly be examined. It held that such a confession should ordinarily be corroborated by other prosecution evidence, and that a conviction should not rest on it alone unless it is of a very high quality; and that the surrounding circumstances must make it probable that such a confession would be made to such a person — there must be a reason why the accused chose him.

Ratio: An extra-judicial confession is a weak piece of evidence to be received with great caution. It must be voluntary, truthful, clearly proved in its words, corroborated by other evidence, and made in circumstances which make it probable that it would be made to that person.

📖 State of Rajasthan v. Raja Ram, (2003) 8 SCC 180

Facts: An extra-judicial confession was disbelieved by the courts below largely on the footing that such evidence is inherently unreliable, and the State appealed against the resulting acquittal.

Held: The Supreme Court held that an extra-judicial confession, if voluntary and true and made in a fit state of mind, can be relied upon by the court, and that the evidentiary value of such a confession depends on the veracity of the witness to whom it is made. The Court held that there is no rule of law that an extra-judicial confession must be rejected, or that it can never form the basis of a conviction: it is a piece of substantive evidence, and the only requirement is that it be proved like any other fact and be found trustworthy. It held that where the witness to whom the confession was made is a person of unimpeachable character and standing, having no reason to state an untruth, and his account is consistent and unembellished, the confession may be acted upon; but that the Court must examine whether the confession was voluntary, whether it was made in a fit state of mind, and whether the surrounding circumstances support it.

Ratio: An extra-judicial confession, if voluntary and true and made in a fit state of mind, can be relied upon. Its value depends on the veracity of the witness to whom it was made, and there is no rule that it must be rejected.

⚠ The rules common to both

A confession to a police officer is inadmissible, and so is one made while in the custody of a police officer unless made in the immediate presence of a Magistrate.

A confession caused by inducement, threat or promise proceeding from a person in authority is irrelevant, where it gives the accused reasonable grounds for supposing that he would gain an advantage or avoid an evil of a temporal nature.

A retracted confession may still be acted on, but a court will look for corroboration before doing so, and will examine the reasons given for the retraction.

And so much of a statement as leads to a discovery is admissible, whether or not it amounts to a confession and whether or not it was made in custody — which is why the rules on confessions are so often argued alongside the rule on discovery.

The position stated shortly

1. A judicial confession is made to a Magistrate under section 183 or in a judicial proceeding; an extra-judicial confession to anybody else.

2. A confession must admit in terms the offence, or substantially all the facts which constitute it. An admission of a gravely incriminating fact is not of itself a confession.

3. A judicial confession carries the explanation, the satisfaction as to voluntariness, time to reflect, the signature and the memorandum. An extra-judicial confession carries none of these.

4. A judicial confession is substantive evidence; an extra-judicial confession is a weak piece of evidence requiring great caution.

5. It must be voluntary and truthful, must inspire confidence, and its words must be clearly proved: Sahadevan.

6. The circumstances must make it probable that such a confession would be made to that person — there must be a reason why the accused chose him.

7. It should ordinarily be corroborated, and a conviction should not rest on it alone unless it is of a very high quality.

8. But there is no rule of law that it must be rejected. If voluntary, true, and made in a fit state of mind, it may be relied upon: Raja Ram.

9. Its value depends on the veracity of the witness to whom it was made — his character, his standing, and whether he has any reason to depose falsely.

10. And the common rules apply to both: no police confession; none caused by inducement, threat or promise from a person in authority; a retracted confession needs corroboration; and a statement leading to a discovery is admissible regardless.