Robert yes that was a strange tile, especially when read in conjunction with this one. If you read further down the post it becomes clear that this information was for the posters daughter.
You daughter has to go to the locla police station and ask for a "good behaviour certificate" I personally have never heard of one begin issued by Spanish authorities.
When she does go she should take a translator, several copies of all the paperwork she has to able her to live in Spain. Plus several passport sized photos. In the end she may not need them but knowing "the system" you will find they will want copies of something. Having them ready will save having to go back to the end of the queue again.