Below are the guidelines from
The Universal House of Justice:

" The Universal House of Justice has
instructed us to say that there is
no objection to the Baha'is being
members of Alcoholics Anonymous,
which is an association that does
a great deal of good in assisting
alcoholics to overcome their
lamentable condition.

The sharing of experiences
which the members undertake
does not conflict with the Baha'i
prohibition on the confession of sins:
it is more in the nature of the theraputic
relationship between a patient
and a psychiatrist."