DHL has put a number of invoice validation rules in place on Tradeshift:

• The invoice issue date must be within 30 days from the current date and future date invoices are not allowed, to stop "back&future-dating" of invoices
• All invoices must have either a valid Purchase Order number or Cost Centre at header level

• DHL PO Numbers: All invoices sent via Tradeshift must contain a DHL PO Number. These numbers should be issued to you by your DHL representative at the time of order placement. These numbers can be provided once at the invoice header level, or, on all lines of the invoice.
  (Examples: C1234567890, S12345678901, BXXX1234567)
• DHL Cost Centre Numbers: In some specific cases, a DHL Cost Centre Number might be required instead of a DHL PO Number.

Further to this, it is important to note that there are some “standard fields” on typical invoices that DHL does not receive from the Tradeshift platform (not visible in the web interface, and simply ignored in the case of EDI files); they are:

• Invoice due date: Invoices will always be paid based on the previously agreed terms and conditions, as stipulated in your supplier agreement, and therefore are not necessary within the individual invoice.
• Payment details: Invoices will always be paid, based on the payment details that your customer has registered within its financial system. If you need these changed, then you should contact your customer directly.