In the event it is brought to the attention of the city council that a violation has taken place, before revoking or suspending such registration certificate, the city council shall cause notice to be served upon the registered business owner, setting forth in general terms the violation or violations claimed to have been committed and such notice shall provide a time for the registered business owner to respond to the allegations. The city council may revoke or suspend the registration certificate if the city council finds that the registration certificate was issued in error or that the registered business owner has violated the provisions of this chapter. No refund of any unused portion of the registration certificate fee shall be made to the registered business owner. (Ord. 98, 9-18-2007)