Field	Description	Type	Mandatory
fb_person_id	ID of a person (once set this value could not be changed by a PUT request any more)	integer	yes
bank_account_owner	Name of the bank account owner	string (150)	If bank_bic, bank_iban, bank_account_number or bank_number is given, bank_account_owner must not be empty.
bank_number	Bank number	string (30)
bank_account_number	Bank account number	string (30)
bank_iban	IBAN	string (100)
bank_bic	BIC	string (100)
bank_name	Name of the bank	string (200)
bank_country	The country	2 letter country code
is_main	true if it is the main bank account	boolean

🚧
Mandatory fields
Please note that almost every field is optional, but there are some dependencies between fields! Therefor there are some special rules:

There must be a value for at least one field.

If bank_number is given, bank_account_number must not be empty.

If bank_account_number is given, bank_number must not be empty.

If bank_bic is given, bank_iban must not be empty.

If bank_account_owner is given, a combination of bank_bic/bank_iban resp. bank_account_number/bank_number must be given, too.

Errors according to the rules above results in a "bank_account_incomplete" error.