Deleting is not possible if:

• the document is already posted (see Document is already posted! Deleting is not possible!), or if material consumption has already been posted for the document (see Document already has the use of material posted! Deleting is not possible!);
• it is already linked with an accounting entry, SAD, or Intrastat report (see SAD/Intrastat is already created for the document! Deleting is not possible!);
• if a serial number has been issued with an issu document  (see Serial number XXX has already been issued!);
• A negative prepayment invoice or invoices have already been created for this document (see also The document cannot be deleted! Negative advance invoice is already created!).