They will not replace this.  Write down the tag in bios and keep track of your receipt and or customer order number. The warranty doesn't cover lost service tag label or COA windows label.

Thanks, I do have the service tag written down. I also have a photo of the label :)

Just wanted to know if there will be issues claiming warranty without the sticker on the machine if the technician cannot boot into the machine and I dont have the sticker on the machine either. 

Another way to remember is to create an account on Dell.com website and then add the service tag to your account. Then if you ever need it, it will be online and you can use it on the support website.