The Financial Crimes Enforcement Network (FinCEN) safeguards the financial system against illicit activities using the Beneficial Ownership Information Reporting (BOIR) E-Filing System, enabling electronic submissions by financial entities. Users often face the "Invalid attachment" error, which occurs due to improper file formats (only JPG/JPEG, PNG, PDF accepted) or filenames with spaces/invalid characters. To resolve this, ensure files are correctly formatted and named.

The Corporate Transparency Act (CTA) mandates that LLCs and Corporations in the U.S. report detailed information about their beneficial owners and company applicants to FinCEN. This includes the full legal name, date of birth, residential or business address, and an identifying number from an acceptable ID document (such as a driver's license or passport), along with an image of the document.