Among the documents issued at a community center (jumin center), which one serves foreigners as official proof that 'I live here'?

The certificate of alien registration facts, issued at a community center or jumin center, officially confirms your registered residence and personal details as a foreigner, functioning as the formal document Korean banks, employers, and landlords accept as proof that you actually live at a given address.

A stamped passport copy or a handwritten note from a landlord might feel like reasonable informal evidence, but neither carries any official standing with Korean institutions, which specifically require the government-issued certificate rather than an ad hoc substitute.

Because this certificate ties directly into the alien registration system, requesting it is usually quick once your registration and address are properly on file — one more reason keeping your residence registration current within that 15-day window pays off later when an institution suddenly asks for formal proof of address.