Just inform you that this is a must issue the custom invoice 2 weeks in advance at least for 3 invoice because it is a long process for get permit and COO form approval at Cambodia side around 2 weeks time too.
If already confirm you for the whole month delivery date it up to you if you don’t issue all at one time, but you have to follow strictly to send us the custom invoice within 2 week in advance and the invoice must fix when the custom approved.
Pls be careful for the process issue custom invoice. Pls process and send me on no letter than next Monday 28th Oct.