In case the receiver has not received the parcel but the status shows that the delivery is successful, the clients can file the request for investigation through these channels:
1) https://www.thailandpost.co.th/un/form/complaints/?form_id=3
2) E-mail: [email protected]
3) Call 1545 or 0 2831 3600
4) Inbox the Facebook page “บริษัท ไปรษณีย์ไทย จำกัด” (www.facebook.com/thailandpost.co.th)
5) Post offices