Is it legal not to pay the property fee and not to give the key to the property?

Hello, dear! It is illegal not to pay the property fee and not to give the key. If the developer or property management company does not sign a property service contract and does not give the owner the key, this behavior is an infringement on the legitimate rights and interests of the owner and constitutes a breach of contract by the developer to the owner. As the owner, you can negotiate directly with the developer. If it fails, you can sue the developer for breach of contract to the court and ask him to bear the compensation for the losses caused by the breach of contract.