The Malaysian tax authorities say they create a number for every non Malaysian recipient. I think Y&R Thailand has one since you have received payments from your Malaysian client. The Malaysian tax authorities will issue a number after the first payment. We quote the Malaysian tax numbers of non Malaysian companies who have received payments from us more than once as can be seen in the attached form. Please see section 7. If you do not have a Malaysian income tax number, please provide us the registration number of your company.
Thanks and regards