The Ministry of Science and ICT's Postal Service said on Sept. 29 that forged or altered postal delivery notices have been found in some areas and urged users to be cautious.

Delivery notices issued by the Postal Service are made of special thermal paper like receipt paper. The attached portion also peels off easily like a sticky note and leaves no adhesive residue on the surface.

Recently found forged notices were made by changing a mail carrier's contact number to a number used for phishing or by tampering with a QR code, making them not easy to distinguish by sight, it said. The Postal Service stressed that users should also suspect forgery or alteration if ordinary paper is attached with transparent tape or if removal leaves traces like a regular sticker.

If users find a suspicious notice, they should contact the postal customer center or a nearby post office to check whether an actual delivery has been made. The Postal Service said it does not ask for resident registration numbers or bank account numbers online or by phone, and urged users not to comply if asked to enter such information.

Postal Service chief In-hwan Park (박인환) said, "Methods of impersonating post offices are becoming more diverse." He added, "If you suspect it was sent by a post office, you should contact the post office directly and check."