When a conviction depends largely on the victim’s testimony, the courts turn to a set of established parameters to assess its credibility: the so-called “triple test”. It is worth knowing it, but also understanding its limits.
The three classic elements
The triple test requires analysing: (1) the absence of subjective incredibility, that is, the absence of spurious motives (resentment, revenge, enmity, self-interest) that would deprive the statement of its capacity to generate certainty; (2) the plausibility, supported where possible by objective peripheral corroboration; and (3) the persistence of the incrimination, sustained over time and free of relevant contradictions.
Corroboration is not always required
In offences committed in private there may be no peripheral corroboration. The Supreme Court makes clear that such corroboration must not be demanded at any cost: it may be absent, weak or unnecessary. What is decisive is whether the court concludes that the account is credible, reliable and truthful.
“Demystifying” the triple test
The Supreme Court itself has warned that these three requirements are neither a fixed standard of proof nor the only factors to be considered. The assessment of witness evidence is more complex and cannot be mechanically simplified (STS 679/2022 of 5 July and STS 299/2024 of 9 April). The triple test is a guide, not an automatic checklist.
Practical consequence
For the defence, it is not enough to invoke the triple test in the abstract: the spurious motive, the lack of plausibility or the core contradictions that erode persistence must be demonstrated in the specific case. For the prosecution, the absence of corroboration does not, by itself, prevent a well-reasoned conviction.
Source: Vicente Magro Servet, “La declaración de la víctima en el proceso penal”; and Supreme Court judgments (Second Chamber) 119/2019 of 6 March, 679/2022 of 5 July and 299/2024 of 9 April.
Informative article; it does not constitute legal advice.
The triple test is decisive in proceedings that rest on a single statement, notably in offences of sexual assault and bodily harm within the family. We analyse each case in the light of these criteria before setting the strategy for the criminal defence.
Frequently asked questions
What is the Supreme Court’s triple test?
A set of parameters for assessing the credibility of the victim’s testimony: absence of subjective incredibility (no spurious motives such as resentment or self-interest), plausibility supported where possible by objective peripheral corroboration, and persistence of the incrimination over time without relevant contradictions.
Is peripheral corroboration always required?
No. In offences committed in private it may be absent, weak or unnecessary; what is decisive is whether the court concludes that the account is credible, reliable and truthful.
Is the triple test a fixed standard of proof?
No. The Supreme Court itself has warned (STS 679/2022 of 5 July and STS 299/2024 of 9 April) that the three requirements are neither a fixed standard nor the only factors to consider; it is a guide, not an automatic checklist.
Francisco Javier Martín Porras
Abogado penalista, socio de Société de Conseil Juridique et Expert y creador de la metodología LIWARD®. Dirige la defensa en procedimientos penales de alta complejidad, combinando estrategia procesal con análisis pericial y forense. Conozca al equipo →
