@startuml
|Admin|
start
:Select Check Invoice Page;
|Website|

:Retrieve Processing Payment;
:Return Check Invoice Page;
|Admin|
:Select Approve or Reject Button;    
if (Admin Approve) is (Approve) then
else (Reject)
    :Admin Give Reason for Rejection;
|Website|
    :Send Rejection Message;
endif
:Update Payment Status in DB;
stop
@enduml