check_accountNumber {#check-account-number}
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The customer's bank account number.  
When processing encoded account numbers, use this field for the encoded account number.  
When scoring a direct debit transaction, use this field if you do not or are not allowed to provide the International Bank Account Number (IBAN).

> Do not include the IBAN or BBAN in this field. Include the IBAN in the fundTransfer_iban field.

Specifications {#check-account-number_d970e36}
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* **Data Type:** Non-negative integer (for e-check transactions); String (for all other transactions)
* **Data Length:** 17 (for e-check transactions); 30 (for all other transactions)

Mapping Information {#check-account-number_d970e55}
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* **REST API Field:** paymentInformation.bank.accountNumber
* **SCMP API Fields:**
  * bank_account_#
  * ecp_account_#
* **Simple Order API Fields:**
  * check_accountNumber
* fundTransfer_accountNumber