We are arrived in EU at Frankfurt. They did not put an entry stamp in my wife's passport, as we were travelling onto Malaga. At Malaga, although we asked they said no problem just go the police station the next week to register. When we did that they asked where the entry to EU stamp was !!!!
Back to Malaga airport. They said it had to stamped where she had first arrived in EU.
Fortunately I speak reasonable Spanish and had worked as a volunteer translator with the Spanish police. I eventually managed to get them to stamp the passport.
