Do NOT move your residence registration out before you get the deposit back
If you register your residence at a new address before the deposit is returned, you instantly lose 대항력 (opposability) and 우선변제권 (priority claim) on this home. You drop in priority if the property is auctioned, and your position weakens if the landlord stalls. Always do it in this order: confirm the deposit has landed in your account, then move your registration. If you truly must leave first, apply for a 임차권등기명령 (lease registration order) at the court before you move — once it is registered, your rights survive the address change.