I always when returning a item at the Post Office or UPS get a receipt. I see people drops off returns and leave without getting a receipt. Package get lost, that's on you.
FYI:
I received my last Christmas packages Oct 13, 2017. Two were returns HSN due to poor quality, I was going to wait until January to return, glad I didn't, the packages were mailed back on Monday Oct 30, 2017.
One package has been received. Believe it or not the 2nd package going to New York did not leave the post office until Nov 02 2017.So if you have items being return, to any of the shopping channel mail now or Dec 26 2017 to get credit before January 31, 2017. My advice it's not worth the hassle, I did about 80% of my Christmas from local retailers, other 20% online. Order nothing from QVC until they figure out their shipping issues.