And, pursuant to article 6(4) of the Civil Code, in these cases will be enforceable parcelization license or the Declaration of his situation. However, notarial and registration control of these mechanisms of fraud is not free from difficulty. The cause lies not only in the greater or lesser complexity of these legal operations, but on the nature and limits of the control exercised by these officials. Because although it is clear that the power of authorization of the notary and the qualification of the Registrar extend to acts fraudulently, the problem lies in its area of competence, because we must not forget that the notary or Registrar are policemen, nor even less judges, nor its action unfolds in a process with all type of guarantees for the citizen. This intrinsic limitation of its control of legality (powers of authorization and qualification respectively) derive many difficulties to exercise its work with fullness in the urban area. However, this limitation may not obscure the important work of control exerted in the bosom of the so-called preventive security, because this is nothing more than a piece most of the control gear that set the urban planning legislation and that, ultimately, it is attributed to councils control of covert subdivisions and urban police work. That is, more than a notary refuses to authorise a deed by having evidence that conceals a fraud or even though the Registrar to inform City Hall the possible existence of an illegal subdivision, corresponds to competent public authorities react to alleged urban lawlessness through the corresponding urban development discipline record. In sum, neither notaries nor registrars can arrogate to itself functions judicial or administrative which correspond to other institutions.