Well, here's what happens when you make assumptions.
I bought several pairs of shoes at an OOT Nordstrom Rack; at home I decided one pair was too sung and needed to go back. I just assumed I could do a return by mail even if I had to pay for a shipping label, since I thought that's what I read, but I didn't read carefully and see that's only for on- line purchases. Called store, and an in- person return is required.
I do have family in town but it would be burdensome to rope them in. Don't think I would be back within the 90- day return window.
Drats.