California
http://resources.lawinfo.com/en/Free-Legal-Forms/Real-Estate/California/index.html
My 2 cents:
A. Sub2 is legal.
B. Realtors hate them.
C. Lawyers hate them too.
D. Calif is SUIT HAPPY.
E. Calif Realtors can practice limited contract law (with E and O insurance).
Good luck!
And, pay for a good Sub2 education, because there are lots of details.
Docs you need:
* Addendum To The Purchase And Sale Agreement
* Quit Claim Deed To Trustee
* Authorization To Release Mortgage Information
* Limited Power Of Attorney Regarding Real Estate
* Insurance Letter
* Escrow Letter
* Letter To Mortgage Lien Holder