There are several types of reports that the police respond to that will not be cancelled by telephone: Domestic violence, child or adult abuse, robbery calls, 911 hang-ups. These calls are rarely cancelled even if you call back to tell us everything is fine.. The reason is a victim can be easily coerced into sounding convincing while telling the dispatcher that everything is okay. Some situations require the physical presence of the police to verify that everyone is safe and that peace has been restored.