On August 26, 2019, at CITES CoP18 Conference in Geneva, Switzerland, parties voted to move small-clawed and smooth-coated otters to Appendix I. That means international trade would be prohibited.
Vietnam laws on wildlife has become more and more strict over time, and might grand no mercy for those who break it. By selling or keeping from 1 to 2 otters, you’ll be fined for a penalty of approximately 330-360 million VND. From more than 3 otters, you will serve a sentence of at least from 1 to 5 years or a fine from 500 million to 2 billion VND.