Any place to donate old clothes? (Bangkok)

Dear All,

I have some secondhand clothes and I wonder if there is any charitable organization who is in need for that so I can bring there for them. Also my concern is that, in my country we often do this, however I am not sure how about here whether it would be considered as an offence or something. Of course the clothes are not too old :) they are still in good state just for no use in present.

Thank you for your advice and opinion,

Regards, Khanh