Question about used Rolex watch Warranty

[hlkenlh]

Hi, I am a new member here, I found a lot of usefull information about rolex here, and I have a question about the warranty on an used watch. If I purchase a used watch from someone, the card is dated and named, can I still bring the watch to AD for warranty? or I have to pay? or I have to send them to somewhere else?

If possible, can someone explain how rolex warranty works? thanks, sorry if the question is noob :P