|  Option A |  [/34x]  4!a2!a2!c[3!c] |  (Account)  (Identifier Code) | 
|  Option K |  [/34x]  4*35x |  (Account)  (Name and Address) | 
Conditional (see rules C1 and C3) in mandatory sequence A
This field specifies the creditor ordering all transactions in the message.
Identifier Code must be a registered BIC (Error code(s): T27,T28,T29,T45).
The name of the creditor must be specified. If the account of the creditor is present, it must be specified in Account.