In the United States you don't have to send in warranty cards to be covered. I don't know about other countries. In the U.S. you do have to keep and provide proof of purchase showing the date the item was bought. Since the stated warranty is for one year, that would be considered the "standard" warranty. The extra four years are provided as a benefit for registering, and for that you do have to send in the card. If you look at the card that came in a sealed envelope with your lens you'll see it is a two-part card. The top is paper lightly glued to the bottom. You fill out the info on the top part, which transfers to the bottom part. You tear off and keep the paper top and mail in the bottom card -- it is a postcard pre-addressed to a Nikon anddrss. Mark Daigle asks: > I have a quick question concerning the Nikon warranty slip. I was >wondering if my warranty will still be valid if I don't mail in the slips. >I have always just keep all my boxes, with all papers inside. Should I mail >out the slips? > >The reason is I just bought the new 80-200AF-S and it had an envelope inside >that said: " 1 yr. Warranty + 4 years extended service" but it also says >the 4 years was only valid if I mailed in the slip?? Is this true, and what >are your opinions on this topic? -- John Albino mailto:[EMAIL PROTECTED]