Admission tickets such as those for the cinema are often composed of a part which will remain to the customer, and a part which will remain to the attendant.
- What are the two parts called?
- What is the action of separating the two parts called?
- What is the word for the dotted line, usually with small holes in it to facilitate the process?
As to the first, the part the customer retains is called a stub (the returned portion of a ticket), and the other part is sometimes known as the counterfoil (though the term can be applied to other things similar to tickets, such as a money order). The second could be tearing or detaching (there isn't a specific term just for tickets, that I know of), and the third is a perforation.
Edit: since the term counterfoil has been found, I decided to go ahead and put it in my answer to make it complete — but the credit goes to user11761.Tweet