Occasionally, customs in the Middle East, require invoices to be both certified and legalised. After certification, invoices have to be presented to the embassy of the destination country for legalisation. This involves presentation of the certified invoices to the embassy which then attaches their stamp to the documents. Allow sufficient time for presentation as goods should not be dispatched before the invoices are legalised. Legalisation can take between five and seven working days depending on the embassy concerned. See commercial invoice.