Any contracting state to the
European Convention on Human Rights can sue another contracting state in the court for alleged breaches of the convention, although in practice this is very rare.
[16][26] As of 2021, five interstate cases have been decided by the court:
[27] - Ireland v. United Kingdom (no. 5310/71), judgement of 18 January 1978 on inhuman and degrading treatment in Northern Ireland (art. 3)
- Denmark v. Turkey (no. 34382/97), judgement of 5 April 2000 ratifying a friendly settlement of 450,000 DKK regarding a Danish national detained in Turkey (art. 3)
- Cyprus v. Turkey (IV) (no. 25781/94), judgements of 10 May 2001 on the treatment of missing persons (art. 2, 3 and 5), the right of return of Greeks who have fled to the south (art. 8, 13 and P1-1), the rights of Greeks still living in the north (art. 3, 8, 9, 10, 13, P1-1, P1-2) and trial by military courts (art. 6). A subsequent judgement of 12 May 2014 awarded €90 million in 'just satisfaction' (art. 41)
- Georgia v. Russian Federation (I) (no. 13255/07), judgement of 3 July 2014 on the collective expulsion of Georgians from Russia (art. 3, 5, 13, 38, P4-4) and Russia not cooperating with the court (art. 38)
- Georgia v. Russian Federation (II) (no. 38263/08), judgement of 21 January 2021