Thanks Khun Ratchadaporn: These vouchers are useful as they help me match up invoices paid with deposits to my bank account, which I sometimes have trouble identifying; they used to be sent automatically on the day of deposit. In any event, I do keep pretty careful records at my end and can usually figure it out!
The last invoice paid on this payment was dated September 8, for THB 4,640. Please note that there is another invoice for me on that day, for THB 750 (PO 48716), which didn't get paid in this deposit; I assume you'll catch it the next time around. If you don't have record of this invoice, however, please let me know.