The property manager made a mistake and undercharged the parking fee for 7 months. When he found out, he said he would return it. Can he not pay?

According to the Civil Law of People's Republic of China (PRC), the owner shall pay the property fee to the property service provider as agreed. If the property service provider has provided services in accordance with the agreement and relevant regulations, the owner shall not refuse to pay the property fee on the grounds that he has not accepted or does not need to accept the relevant property services. According to the Civil Law of People's Republic of China (PRC), property service providers shall not stop power supply, water supply, heat supply and gas supply to demand payment of property fees.

Therefore, if the property manager mistakenly pays the parking fee for seven months and says that he will pay it later, the owner should pay the property fee to the property service personnel as agreed. If the owner does not pay, the property service provider can recover the property fee through legal channels.