No. RFID chips send out a radio signal, which is not affected by permanent magnets. While RFID devices can be powered by a changing magnetic field (by electromagnetic induction), they can not be scrambled, erased or blocked with a strong permanent magnet.

Are chip implants magnetic?

Microchips used for both animals and humans are field powered and have no battery or power source. Therefore, they are inert until they come within the field produced by a reader device, which implants communicate with over a magnetic field.

How do you know if your body has an RFID chip?

The best way to check for an implant would be to have an X-ray performed. RFID transponders have metal antennas that would show up in an X-ray. You could also look for a scar on the skin. Because the needle used to inject the transponder under the skin would be quite large, it would leave a small but noticeable scar.