Trimac requires that all vendors submit a copy of their invoice and supporting documentation along with their electronic invoice.  The system will not allow you to submit the invoice if the attachment is not included.


What should I include as an attachment?

  1. Copy of invoice and
  2. Copy of supporting documentation if applicable (wash ticket, field ticket, packing slip, bill of landing, etc)



NOTE:  The only approved attachment format for Trimac is PDF



  • Click the attachment button
  • Select the attachment type
  • Load the attachment
  • Close