A federal appeals court has blocked King & Spalding’s request to enter a special appearance on behalf Halkbank, the Turkish state-run bank accused of orchestrating a massive scheme to help Iran evade more than $20 billion in U.S. economic sanctions.

The one-paragraph order, entered Friday afternoon, also lifted an administrative stay on Halkbank’s criminal case in federal district court, paving the way for a contempt hearing against the bank in the coming days.