If it was bought with a computer in the same order, you will need to provide the computer's Service Tag. If it was bought separately, you will need to provide the order number and a copy of the invoice. Details here: How to get support for your Dell Keyboard and Mouse that is still under warranty. 
I want to claim a warranty for the product "Dell MS116 1000Dpi USB Wired Optical Mouse"How do I do it?Can I get some help?I possess all the invoices/bills.
Warranty claim for Dell MS116