After creating an upstream progress claim that bills against a client contract, funding or head contract, you can send a copy of the progress claim's 'Detail' tab to your upstream collaborator to review. Once reviewed, your collaborator can then reply directly to that message to indicate that they have approved your progress claim for payment (or to supply you with a reason for rejecting your progress claim). To ensure that your collaborator's response is captured in writing, Procore saves all replies to your outgoing message's 'From' address in the Emails tab on the progress claim.