I wouldn't want someone just leaving my phone at verizon, and hopefully verizon won't give info out to strangers wether you have the esp or not...
I would go to verizon, and have them contact the owner in front of me, and I would speak to the owner over the phone. Then I would leave it with verizon once I knew someone knew their phone was returned and where it was at. I guess I don't trust anyone else to do the right thing....well actually, "I trust everyone. It's the devil inside of them I don't trust!"