A residency application does not just need your police certificate. It needs that certificate legalised for use abroad, and then translated by a translator the receiving authority accepts. Each step depends on the one before it.
Get the order wrong and the file goes back. Translate before the apostille is attached and the certified set is incomplete, because the apostille carries text of its own.
We coordinate the certificate and its legalisation, then produce the sworn translation ourselves. The translation half is our own work, done by a translator authorised for the country receiving your file.
The certificate is for an application, not an end in itself. If that application is Spanish residency, the practical side of moving to Valencia is a separate problem worth solving early.