Write to Sister Croft

This is the address for my mission office, so you can use it for the whole time I'm in California. 

Sister Jessica Croft
California Oakland/San Francisco Mission
4945 Lincoln Way
Oakland, CA 94602

DearElder.com will mail to the mission as well (they print your submission, put it in an envelope and put a stamp on it), but you have to have an account with money to pay the postage.