Hi, I'm assuming it's South Korea. If it is and you are outside of South Korea, you can request it through the Korean Embassy or consulate. I have attached a URL above where you can find all the documents you need. For more details about how to obtain a Korean police certificate click under Police certificate and scroll down to alternate documents. It'll give you detail instructions on what to do

@K H Thank you so so so so much! The link is very helpful!

@Y M you're welcome!