Currently, the registration solution works integrated with MUX 2.0 which requires a default postal address to be entered in order to make the entry.
On the other hand, in the e-TRAM 2.0 forms this information is optional (following the precepts of Law 39/15, as well as the principles of data minimization).
Therefore, and only in cases where citizens do not report their postal data, it is necessary to incorporate by default some minimum data in order to be able to make the entry in the register, and specifically the Postal Code: 12345 (which belongs to the province of Castellón), Street: Prova, 1, which is actually an unreported field (does not appear on the receipt), but which must be transferred in order to be able to make the entry.
This element will be like this temporarily, and until your registration is integrated with the MUX 3.0 solution (expected in early 2024), but in practice citizens have opted for telematic notifications or communications, as indicated on the receipt.