Nick Goepper (USA Freestyle skiier) success - 2014年9月13日 sent him an 8 by 10 back on 3-7-14 & got it back signed today, 9-13-14. Here's the address I used:
c/o U.S. Ski And Snowboard Association
1 Victory Lane
Box 100
Park City, UT 84060
But here's the address that was on the return envelope:
20821 Bellemeade Drive
Lawrenceburg, In. 47025-9352