Automatic Clearing of Vendor Item in FEBAN after EBS processing

Hi Experts,

I've a question with respect to the automatic clearing of vendor open items after the EBS is uploaded.

Our client uses the payment order concept and we receive the payment order back in the CAMT053 xml bank statement. We are using the Interpretation Algorithm 029 - Payment Order for clearing the vendor open items. This is configured against the external transaction tyep PMNTICDTDMCT.

However, there were few vendor items got cleared automatically with the outgoing payment in the Bank statement with external transaction type as PMNTICDTDMCT and without the payment order available in the bank statement.

Can you please let me know what could be the possible reason for this?

Regards,

Surya