Declaration of accommodation by short-term foreign residents went into force as of 10 December 2020 as a measure to prevent the spread of communicable disease in the country.

Foreign residents holding short-term visas- B-1(Visa exempted), B-2(Tourism/transit),
C-1(Short-term news coverage), C-3(Short-term visit), C-4(Short-term employment)
should present passport or a travel document to the owner of the accommodation facility.
A breach of this requirement will result in a fine up to KRW 500,000.

please refer to the attachment for details