Appellant advocate Concourse company has signed a contract with the appellants appeal for lack of legal basis and can not be established.

• 开发商在未征得我们公司及其他广大业主同意的情况下，擅自就小区物业管理问题与中海公司签订委托合同并强行制定收费标准，严重侵犯了我公司的合法权益，并且该委托合同事后也未经我公司及广大业主追认，应属无效。