Speed is critical when stolen assets are stablecoins with freeze capabilities. Contact the issuer's official security or compliance channel immediately with the transaction hash, the destination wallet address, the amount stolen, and any evidence of how the theft occurred. Circle and Tether both have dedicated channels for law enforcement and security incident reporting. Simultaneously contact law enforcement in your jurisdiction, as many issuers require or strongly prefer a formal law enforcement request before acting. Filing a report with the FBI's Internet Crime Complaint Center, CISA, or equivalent authority in your country creates the paper trail that can accelerate a formal freeze request. The faster both the issuer and law enforcement are notified with documented evidence, the higher the probability that funds can be frozen before they are swapped into a non-freezable asset or moved through a mixer.