UDAAP: Unfair, Deceptive, or Abusive Acts or Practices Policy. Among all the changes the Dodd-Frank Act brought, many believe UDAAP will turn out to have the most significant impact on the banking industry, and all third party vendors supplying mortgage lending services to the banking industry. Given the impact and significance of other Dodd Frank Act changes, combined with UDAAP’s broad and vague scope, it could potentially be the most dangerous weapon in the Bureau’s arsenal.