The magnetic flux from NFC tag or reader/writer will induce eddy current on metal surface and generate a reverse magnetic field to offset the magnetic flux to cancel the communication. These Anti-metal NFC Tags (also known as On-metal Tags) are specially made with the purpose to be applied on metal surfaces. Because NFC Tags work by electromagnetic induction, metal inviroment can interfere the it and reduces the performance of the NFC TAGS's antenna,effectively and stopping it creating the current needed to power the chup. NFC tags or stickers are thin simple electronic devices (no batteries or moving components) that contain an antenna and a small amount of memory. Since NFC tags are passive they work only in short distance (4 cm) where RFID tags can send signal to its receiver even if it's few kilometers away, using the built-in battery. NFC tags are special type of passive RFID tags which use specific data format known as NDEF (NFC Data Ex‐ change Format).We recommend using NFC Tags on your desk, nightstand, car, wireless speakers, at your business or even on your pet! These special NFC tags can be applied on the metal surfaces, because they are with a layer of ferriee that protects the magnetic fiels. NFC anti-metal tag is also known as on metal NFC tags or NFC tag for metal, anti metal RFID label, metal adhesive RFID label.