BAU Beginning Segment for the Debit Authorization

To identify the beginning of the Debit Authorization transaction set. The BAU segment is used to identify the Financial Institution and Account of the Payer (i.e. the party authorizing the debit against its account)

Position: BAU-01 · Element: 127 · Name: Reference Number · Type: String (AN) · Requirement: Mandatory · Min: 1 · Max: 30 · Repeat: -

Reference number or identification number as defined for a particular Transaction Set, or as specified by the Reference Number Qualifier.

BAU01 (Reference Number) is assigned by the account holder's application and relevant as an application trace number.

Position: BAU-02 · Element: 591 · Name: Payment Method Code · Type: Identifier (ID) · Requirement: Mandatory · Min: 3 · Max: 3 · Repeat: -

Code used to designate the actual funds transfer method.

Position: BAU-03 · Element: 506 · Name: (DFI) ID Number Qualifier · Type: Identifier (ID) · Requirement: Mandatory · Min: 2 · Max: 2 · Repeat: -

Code identifying the type of identification number of Depository Financial Institution (DFI).

Position: BAU-04 · Element: 507 · Name: (DFI) Identification Number · Type: String (AN) · Requirement: Mandatory · Min: 3 · Max: 12 · Repeat: -

Depository Financial Institution (DFI) identification number.

Position: BAU-05 · Element: 508 · Name: Account Number · Type: String (AN) · Requirement: Mandatory · Min: 1 · Max: 35 · Repeat: -

Account number assigned.

Position: BAU-06 · Element: 459 · Name: Name (30 Character Format) · Type: String (AN) · Requirement: Optional · Min: 2 · Max: 30 · Repeat: -

Free-form organization name or official title as it should appear for mailing address.

BAU06 (Name) identifies the party holding the account being debited. If used, it further serves to identify the account holder to the financial institution.