http://www.aaml.org/American Academy of Matrimonial Lawyers, it's an elite group of lawyers, accredited by the peers, very difficult to get into. They also have to take an exam to be admitted.
The American Academy of Matrimonial Lawyers is an organization of the nation's top matrimonial attorneys from 47 states who specialize in all issues related to marriage, divorce, annulment, custody, child visitation, property valuation, property distribution, alimony, and
child support.
The Academy was founded in 1962 "to encourage the study, improve the practice, elevate the standards and advance the cause of matrimonial law to the end that the welfare of the family and society be preserved."
The Academy currently has chapters in 24 states which conduct local continuing education programs, participate in the legislative process and engage in a variety of other activities to serve the public and to improve the practice of matrimonial law.