It is important to remember that some receivers have activated the “Dynamic Validations” app on their account, which means that they have put certain document validation rules in place. The most common type of validation rules is a requirement to provide a purchase order number. It is important that you ensure that the file format you develop contains the information necessary to uphold all the receivers invoice validation rules. If not, the invoice will be rejected by the receiver, despite being a valid invoice on Tradeshift.