Police say the schemes exploit expatriates' limited familiarity with home-country administrative procedure. Typically the caller poses as an embassy, a consular services agent, or a tax or immigration office, citing 'missing paperwork' or an 'account verification.'

Caller-ID spoofing and forged official documents have grown more sophisticated, making appearances an unreliable test. Hybrid schemes that lure victims into messaging groups and then pitch investments have also been reported.

Police stress that no public agency asks for account passwords or one-time codes by phone or messaging app. The safe course with a suspicious contact is to hang up and call the official main number directly.

Similar approaches recur in Korea's Chinese community, most often invoking immigration or residence status, tax refunds, or customs clearance for international parcels. Hwagyo Sibo does not adjudicate individual cases and recommends verifying through official channels.