I will bring a IDP but do not have the 125cc driving license from my homecountry. I know that they control driving licenses around Chiang Mai pretty frequently, that’s why I wanted to apply for temporary motorcycle license.
So if I understand correctly I can not get a certificate of residency in Bangkok on a 30 days visa exempt. Only if I get a tourist visa.
And maybe it is possible to get a certificate of residency in Chiang Mai on a visa exempt if I pay for the ‘expedited service’ but not 100% sure..