When you pack these up, and take them to your post office to pay for the shipping- tell them you want tracking. Tracking cost $1.15 to add to the package. They will give you a number 20 digits long. Than you can go to USPS.com website and see where the package is, when it will be delivered and other info. This helps the buyer bc they know the package is delivered And on its way. This helps the seller bc they have proof the package was shipped. Plus- though it doesn't happen often, it does happen-- a buyer can try to claim they never got the package and request their credits back, the tracking will protect you- and shows it was shipped or delivered. And also if god forbid the postal service does lose or damage the package, you're tracking number will help you track down the package!