• The cut-off date of suppliers’ invoice has not been set. However, the estimated lead time since suppliers’ invoice to Penspen until Penspen’s submission to PTT is 6 days.
1) 3 days for internal vendors’ invoice approval
2) 2 days for waiting the vendors’ receipt
3) 1 day to gather all documents to submit to PTT
However, the Penspen's invoice will be submitted to PTT a day before last working day of each month.