Where is the serial number on a blue mic yeti?

I recently bought 2 Yeti Mics to be used for podcasting. Unfortunately all yeti mics posses the same serial number so my laptop cannot pic up both mics. In fact I need to send one in to the manufacturer in order to get the serial number of one of them changed. Is there a work around that I can do to change it myself? As you can probably tell I am not too eager to pay shipping and wait for weeks just so that I can use a product that I have already purchased. Any help would be greatly appreciated. Thanks