Functionality
You can use this method to check if a billing document exists.
As an input parameter, you are expected to enter a billing documentnumber in the field BILLINGDOC_NUMBER. This corresponds to the documentto be checked. If an error scenario occurs during processing, this issent back in the output structure RETURN. If, on the other hand, theoutput structure RETURN is empty, then processing has been successfuland the number transferred in the field BILLINGDOC_NUMBER exists.

Notes
Required entries :
BILLINGDOC Number of the billing document to be processed.