Should owners be reminded to pay property fees?

You got it wrong. You should not worry about whether you have the obligation to remind, but ask what is the basis of the late payment fee. Late payment fee belongs to the category of administrative law, which is statutory, mandatory and punitive. In the contract between the owner and the property management company, there should be no late fees, only liquidated damages. At the same time, as you said, it was handed in in the first year, and now it is not finished in the second year. It is normal not to pay the property fee of that year. Few property companies dare to ask for property fees before service.