I didn't sign a contract with the property management company when I bought a house. Can they sue you?

Sign the contract. In addition to the property company, the other side of the property contract is mostly in the following situations: for the project under development and construction, the developer signs the preliminary property management contract with the property company; For formal projects, if there is only one or several big owners, the owners will directly sign a property service contract with the property company. "Regulations on Property Management" Article 2 Property management as mentioned in these Regulations refers to the activities that the owners select property service enterprises, and the owners and the property service enterprises maintain, conserve and manage the houses, supporting facilities and related sites in accordance with the property service contract, so as to maintain the environmental sanitation and related order in the property management area.