You'd want to send it to
1) MTC (until around March 12)
Sister Heather Anne Hathaway
France Paris Mission
Provo Missionary Training Center
2005 N 900 E
Provo, UT 84604
(I assume you can send stuff to this address or there's a place that will mail your letters for free!)
2) Or (after around March 12) send them to:
Sister Heather Anne Hathaway
France Paris Mission
23, Rue du Onze Novembre
F - 78110 Le Vesinet
FRANCE
