Compare FBAR and MeF e-file systems

Review the key differences between FBAR and MeF e-file systems for transmission, format, attachments, EFIN requirements, signatures, and error handling.
The following table shows the key differences between FBAR and MeF e-file systems regarding transmission, format, attachments, EFIN, signature, and errors.
Process
MeF
FBAR
Transmission
The system transmits federal and state returns to the IRS
The system transmits through the FinCEN batch filing system
Format
XML
XML
Attachments
You can include PDF attachments
You can't include attachments
EFIN
You must have an EFIN to e-file
N/A
Signature
You use a PIN signature or attach Form 8453 PDF
When filing through the FinCEN batch filing system using a 3rd party, the filer and the 3rd party sign and retain Form 114a
Errors
The IRS and states can reject returns for validation errors and business rule validations
The system generates 2 types of errors:
  • Fatal Error
    : FinCEN rejects the FBAR
  • File Error
    : FinCEN accepts the FBAR but you must file it as a corrected report

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