Seller and receiver compromise in point of using application response in transferring phase of invoice. After receiver attains the invoice, he organizes "ACCEPT" application response and delivers to seller. Acceptance process is completed. Seller keeps application response along with the invoice throughout legal safekeeping duration. 
Activity Diagram of Accepting Invoice
Party | Activity | Definition |
|---|---|---|
Seller | Drawing up invoice and sending | Seller sends the invoice to receiver |
Receiver | Receiving invoice | Purchaser, receives the invoice |
Receiver | Sending application response | Sends application response to seller regarding that he accepts the invoice |
Seller | Receiving application response | Application response is received and recorded after it is matched with invoice |
b.Refusing Invoice
In the event of refusing the e-invoice for various reasons, "REFUSAL" application response is drawn up and sent to seller. In case of refusal, the reason of it has to be written in General Descriptions field of application response. Seller must keep the application response along with the refused invoice throughout legal safekeeping duration.
Figure 3. Activity Diagram of Refusing the Invoice 
Party | Activity | Definition |
|---|---|---|
Seller | Drawing up and sending invoice | Seller sends invoice to receiver |
Receiver | Receiving invoice | Receiver accepts the invoice |
Receiver | Sending application response | Sends application response to seller regarding that he refused the invoice |
Seller | Receiving application response | Application response is received and recorded after it is matched with invoice |
Seller | Refusing application response | Application response is received after matched with refused invoice it is recorded. Can be protested through external manners. |
Seller | Accepting application response | Necessary regulations are done and a new invoice can be drawn up |
"RETURN" type invoice can be drawn up by receiver in case Trading Scenario is applied.
Because of the reasons came up after recording the invoice to legal books by seller or receiver, in case of returning all of the material or some of them, receiver sends return invoice and "RETURN" application response, which contains returning reasons, to seller. Seller keeps application response along with the invoice throughout legal safekeeping duration. Return invoice is drawn up using return invoice option from invoice type field in "UBL-TR Invoice" type invoice. The date, number, universal singular defining number and returning reason of sales invoice (belonging to returned material) is written to "General Descriptions" of return invoice.
Figure 4. Activity Diagram of Returning Invoice 
Party | Activity | Definition |
|---|---|---|
Seller | Drawing up and sending invoice | Seller sends invoice to receiver |
Receiver | Receiving invoice | Receiver accepts the invoice |
Receiver | Sending application response | Application response is sent to seller in which returning reasons are written |
Receiver | Sending return invoice | Materials are returned and return invoice is drawn up |
Seller | Receiving return invoice with application response | Application response and return invoive is received and recorded. |
Figure 5. Trading Invoice Scenario Workflow (Envelope Flow Template)
In trading invoice scenario, mail box has the right to "ACCEPT", "REFUSE" and "RETURN" the received invoice.