Complaint channel are as below:
(1) Direct verbal or correspondence complaints to
- Internal audit manager, Tel: 0-2295-0911 ext. 168
- Accounting manager, Tel: 0-2295-0911 ext. 250
- HR manager, Tel: 0-2295-0911 ext. 286
- Company secretary, Tel: 0-2295-0911 ext. 323

(2) E-mail address : anticorruption@thanulux.com
(3) Suggestion box
(4) PO Box.27, Sathupradit post office, Bangkok 10124 or message box below