The Supreme Court of the Republic of Peru, has established as a criterion in its agreements and appeals, that in claim demands, when the parties claim property rights, they should no longer be declared inadmissible under the argument that they must previously determine who has the best property right, but right there, must be resolved as a controversial point. Now, when the best property right is determined as a controversial point to resolve the claim, it has been substantiated as if it were a purport, the parties exercising the guarantees that due process contains, including the audi alteram partem and the right to the test, to assert its property right and / or to question the other, but as it was not requested, a ruling on the merits can not be issued, this in merit to the principle by which only the parties can incorporate the or the petitions, having to do so in a clear and concret...