3587913 - Error in API_APAR_SEPA_MANDATE_SRV "Customer & does not have bank details with IBAN &"

An error message appears when attempting to send a SEPA mandate via the ODATA API_APAR_SEPA_MANDATE_SRV. 

The error message states: "Customer & does not have bank details with IBAN &".

SAP S/4HANA Public Cloud Edition

Customer and IBAN are correctly maintained in BP master data. Send SEPA Mandate via API_APAR_SEPA_MANDATE_SRV.

Here is an example of the Payload file where:

• Customer number is entered in <Sender> 
• IBAN is entered in <SenderIBAN>

<SEPAMandateSet>
  <SEPAMandateType>
    <Creditor>xxxxxxxxxxxxxxxxxx</Creditor>
    <SEPAMandate>nnn-nnnn</SEPAMandate>
    <SEPAMandateApplication>F</SEPAMandateApplication>
    <SEPAPaymentType>N</SEPAPaymentType>
    <SenderType>XXXnnnn</SenderType>
    <Sender>123456789</Sender>
    <SenderCountry>XY</SenderCountry>
    <SenderIBAN>XXnnnnnnnnnnnnnnnnnnnn</SenderIBAN>
    <SenderBankSWIFTCode>XXXXXXXXXXX</SenderBankSWIFTCode>
    <RecipientType>XXXnnnn</RecipientType>
    <Recipient>nnnn</Recipient>
    <RecipientCountry>XY</RecipientCountry>
    <ValidityStartDate>YYYY-MM-DD</ValidityStartDate>
    <SEPASignatureCityName>Somewhere</SEPASignatureCityName>
    <SEPASignatureDate>YYYY-MM-DD</SEPASignatureDate>
    <SEPAMandateStatus>1</SEPAMandateStatus>
  </SEPAMandateType>
</SEPAMandateSet>

 The issue arises due to incomplete Customer number (9 digits or less).

<Sender> is set up for 10 digits. If Customer number has 9 digits or less, fill it to 10 digits with leading zero.

SAP S/4HANA Cloud Public Edition, SEPA Mandate, ODATA API, Error, Customer, IBAN, Bank Details, Master Data, API_APAR_SEPA_MANDATE_SRV, FSEPA_M3_PC, SEPA055, SEPA 055  , KBA , CA-BK-SEP-2CL , SEPA Mandates: Public Cloud , Problem