It's common practice to have your own seal/stamp in Korea. At first I thought it's only possible for Korean nationals but I just found out that as a foreigner, I can also register my seal at the local Korean office. Check out the following:
1. If you are already a naturalized Korean citizen(acquiring Korean citizenship through marriage):
* All you need to do is to bring your resident registration card and seal 도장(do-jang) at the city, ward, town, or myeon office of the residence printed on your resident registration card.
2.If you are a foreign national married to a Korean you can also have your own seal/stamp registered by:
*Bring your ARC Alien Registration Card and seal 도장(do-jang) to the city, ward, town, or myeon office of the residence printed on your alien registration card.
2. Seal registration certificate can be issued at your nearest administration agency, including city, district, ward, town, myeon, or dong offices. You will be issued a seal registration certificate when you show your i.d.(resident registration card, ARC Alien Registration Card, or passport).
3. You can also request for protection or cancellation of your registered seal at your nearest administration agency by just showing your i.d. card.