Where the proprietary interest takes the form of a claim, the Court has taken the view that it may be regarded as an "asset" only where it has a sufficient basis in domestic law (see Chorbov v. Bulgaria, no. 39942/13, § 35, 25 January 2018 with further references), or where the applicants had "a claim which was sufficiently established to be enforceable" (see Gratzinger and Gratzingerova v. the Czech Republic (dec.), no. 39794/98, § 74, ECHR 2002-VII) or where the persons concerned were entitled to rely on the fact that a specific legal act would not be retrospectively invalidated to their detriment (see Kopecký, cited above, § 47, and Noreikiene and Noreika v. Lithuania, no. 17285/08, § 36, 24 November 2015) and where such legal acts could consist of a contract, for example (see Stretch v. the United Kingdom, no. 44277/98, § 35, 24 June 2003, and Fedorenko v. Ukraine, no. 25921/02, §§ 23-24, 1 June 2006).

Where the proprietary interest takes the form of a claim, the Court has taken the view that it may be regarded as an "asset" only where it has a sufficient basis in domestic law (see Kopecký v. Slovakia [GC], no. 44912/98, §§ 49 and 52, ECHR 2004-IX; Maurice v. France [GC], no. 11810/03, § 66, ECHR 2005-IX; Vilho Eskelinen and Others v. Finland [GC], no. 63235/00, § 94, ECHR 2007-II; and Parrillo, cited above, § 213), or where the applicants had "a claim which was sufficiently established to be enforceable" (see Gratzinger and Gratzingerova v. the Czech Republic (dec.), no. 39794/98, § 74, ECHR 2002-VII) or where the persons concerned were entitled to rely on the fact that a specific legal act would not be retrospectively invalidated to their detriment (see Kopecký, cited above, § 47, and Noreikiene and Noreika v. Lithuania, no. 17285/08, § 36, 24 November 2015) and where such legal acts could consist of a contract, for example (see Stretch v. the United Kingdom, no. 44277/98, § 35, 24 June 2003).