Many cities give citizens a chance to evaluate the service by providing pre-addressed, paid response cards. These may be automatically mailed when a request or complaint is received, or mailed or left at the citizen's door after the work is complete. Citizens are sometimes asked to return the cards to individual departments, but they're usually sent to the city administrator or mayor's office. Some local governments send evaluation cards periodically to a set number of randomly selected citizens to get a reading on community satisfaction.