Dear Khun Charlotte,
I am Napapa (Air) from Roche Thailand. I have informed that Siam Kargo is local agent with appropriate contract and you will be performing customs clearance for study BO25430. First of all i would like to know did you have experience in drug product? Our product is 3002.10 tariff code and no tax. However would you like me to prepare document? (i.e. Power of Attorney or anything else)