Withdraw funds

• Is there a fee for sending or withdrawing funds?
• I have sent a transfer, but it did not come! Where is it?
• I have sent the payment, but it did not go from my address. Why?
• How can I make a transfer from an account?
• What is the minimum amount I can send?
• What happens if I send the payment to the wrong address?
• Can I cancel a submitted payment?