when you take it in to the post office to mail it just tell the person at the window that waits on you that you wont to send this with a tracking number,then when you get the recipe it will say on it the tracking number then when you get on here and hit the sent it button there will be a spot to add in the tracking number and it will ask how you sent it just click on USPS. then it will say let the person know that you sent their item with tracking and hit yes..