Professional Organizations
IARP visa membership organization for Reiki Professionals.
It offers liability insurance for USA, Canada and UK Reiki professionals. In the USA, the cost to members for part time insurance is $145-$205/year, they will also quote plans for Reiki plans for Reiki centers.
They also have a certificate service for Reiki teachers who do not wish to create their own certificates.
Reiki Organizations and Associations
This website had a nice list of some of the Reiki organizations out there that may be worth investigating.
This is a listing on Holistic Webworks of Reiki Organizations, that had some good resource.
Reiki associations generally work to protect the rights of their members and to promote standards for education and training. Professional organizations in the field of Reiki often provide insurance for their members. Many are concerned about issues of attunement and preserving the legacy of Mikao Usui. Listed below is a sampling of professional organization in the field of Reiki energy healing. Reiki practitioners are encouraged to seek out additional professional organizations in their own locale.
This program is so new it hasn't been announced yet, but the Center is talking about creating an affiliated teachers network. This will be a less formal association than being a licensed teacher. I will let you know the details as soon as I do.