I sold a utility trailer to someone 15 years ago. They never registered it with California DMV. Now they have received XXXX parking tickets from the City of XXXX XXXX for parking in a street sweeper zone. I went to DMV and had them stamp non-responsibiltity statement and sent it to the City of XXXX XXXX XXXX Department. The stamp is not back dated to 15 years ago, so the City of XXXX XXXX turned me into collections for the parking tickets that are not mine.