Buying a second-hand house, without proof, is it to investigate the responsibility of selling or property?

What you want to ask is that selling a second-hand house property, without issuing a certificate, is the property responsibility. Yes

1. According to Article 41 of the Regulations on Property Management, if a property service enterprise fails to provide property services to the owners in accordance with the relevant provisions of the state, thus causing damage to the legitimate rights and interests of the owners or other obligees, it shall bear civil liability according to law and be subject to administrative punishment.