The Contractor shall issue a bill to collect the service fees to the client on 5th of service month and Client shall pay the service fee to the Contractor by cashier’s cheque upon receipt of the Contractor’s invoice and other relevant documents (such as Time Sheet) Payment will be made by cheque or transfer to bank account within 30 days after billing date. Client agrees to make no deduction from the Contractor monthly invoice amount without the express consent of the Contractor.