<prompt> Human: Do I have to give it back? Hes threatening to call the cops because he doesnt want the ticket anymore.  <response>: If you gave him the football ticket, the exchange is likely done and over with. There are some laws, which vary by state, that allow refunds for some instances door to door sales, buying a car, or getting a loan but its a pretty safe bet that those laws dont apply for a personal transaction like this and especially over the internet - those laws are to protect against high-pressure sales or sales in which a company can lie or provide misleading information. So let him call the cops. 