By RFID MFG Editorial Team · Updated June 14, 2026
As contactless payment, smart ID and wireless access become everyday technology, so does the risk of unauthorized scanning. A criminal with a hidden reader can, in theory, attempt to read a contactless card through a bag or pocket. RFID MFG’s new blocking card is designed to neutralise that threat.
Slipped into a wallet or cardholder, the card disrupts unauthorized reads at 13.56 MHz so the cards beside it cannot be silently scanned. It is a simple, brandable way for banks and businesses to give customers peace of mind.
Passive vs active blocking cards
| Type | How it works | Power |
|---|---|---|
| Passive shield | Detunes/absorbs the field | None needed |
| Active jammer | Emits a disrupting signal | Built-in battery |
Key takeaways
- Protects a whole wallet from contactless skimming
- Passive shielding or active LED-jamming versions
- Fully printable for bank and brand promotions
- Lightweight, everyday card format
Frequently asked questions
How does an RFID-blocking card work?
It either absorbs and detunes the 13.56 MHz field (passive) or emits a disrupting signal (active), so nearby contactless cards cannot be read without your knowledge.
Does one blocking card protect all my cards?
A single card placed in the same wallet or sleeve shields the contactless cards around it; very large wallets may benefit from one on each side.