A customer C disputes the vendor's (V) position on price or value after the transaction is complete.  For example a denied return.

  1. Document the dispute referencing the purchase document (D)
  2. Submit dispute document to a mutually agreed resolution authority (A)
  3. A rules on the dispute and documents their ruling (R)
  4. Parties agreement: A, V and C sign R
  5. Perform the ruling actions
  6. Record the transaction