A strategy may be to send money to individuals fraudulently posing as enrolled members of federally-recognized tribes and then prosecute them, using the receipt of a money order, cashed check or wire-transfer under wire fraud statutes.
The problem then would be about how to prosecute enrolled members who fraudulently solicit money based on a claim if only because IRA tribal councils are notorious for using parliamentary maneuvers (such as failing to establish a quorum for committee action) to defeat legitimate issues raised by tribal members.
The following article in the Rapid City Journal is about a man posing as a Green Beret officer being sent to prison.
http://rapidcityjournal.com/news/man-who-lied-about-being-green-beret-colonel-gets-months/article_8a594e22-d373-11e0-8d24-001cc4c03286.html.
