Since as OP mentioned that he will send the payment in advance for Senior Member and up, I already tried it. This is to confirm that I received the complete payment ahead of time and did the task after. All is well, payment sent - task done. Thank you @ Crypto-Master. Transaction link below for reference:

https://blockchain.info/tx/eac89f381c25a6442fb759d0ff62cb8b6c767ae121cad1ddee8d89d0ce7a3c32