Another common oil leak problem is one-time use engine oil drain plug gaskets that must be replaced at each oil change. If the oil change place is not experienced with your vehicle make or model, they may not know that a new gasket needs to be installed, or they may not have the correct gasket when doing your oil change.
Reporting oil leaks during an oil change is part of a quality oil change. Oil leaks can lead to low oil levels and engine damage, as well as the mess they create.