The rule, and why it is applied strictly
Article 35 § 1 requires an applicant to have used the domestic remedies that were available, effective and sufficient to redress the complaint. The rule is not a formality: it reflects that the Convention system is subsidiary, and the Court applies it with a degree of flexibility but without ever abandoning it.
It also has to be done properly. Raising the substance of the Convention complaint at the domestic stage — at least in substance, and in compliance with domestic formal requirements — is part of exhausting the remedy, not a separate courtesy.
The amparo problem
The recurso de amparo before the Constitutional Court is the step that causes the difficulty. Since Organic Law 6/2007 made admissibility conditional on the applicant demonstrating the special constitutional significance of the complaint, whether amparo is an effective remedy that must be exhausted is not a question with one permanent answer — it depends on the right invoked and on the shape of the complaint.
The practical consequence is unforgiving. Take it when it was not required and you may reach Strasbourg out of time. Skip it when it was required and the application is inadmissible. Both errors produce the same result and neither is recoverable.
Effective, available, sufficient
Effective
Capable in practice of redressing the specific complaint — not merely of reviewing the case in general terms.
Available
Accessible to this applicant on these facts, with reasonable prospects, and not dependent on the discretion of an authority to open it.
Sufficient
Able to deliver the redress sought. A remedy that can declare a breach but cannot produce payment is not sufficient for a creditor.
Amparo and the clock
The two problems compound. The four-month limit runs from the final decision in the effective remedy, so classifying amparo wrongly does not just risk an exhaustion objection — it moves the date the clock started.
An applicant who pursues amparo unnecessarily may find that the limit expired from the earlier ordinary decision. One who omits it where it was required is inadmissible for non-exhaustion. The safe course is to decide the question deliberately at the outset and to preserve the reasoning, so that whichever way it is answered the file shows a considered choice rather than an assumption.
What we check before filing
Which remedies were genuinely open, whether the Convention argument was raised in substance below, and the exact date of the decision that closed the effective route. Those three answers decide the case long before anyone argues about non-enforcement.
Ready to Move Forward?
New ECHR rulings are holding States to account. Yours could be next.
Request a free evaluation2026 ONRIGHTS — European debt-claim escalation · Coimbra