RFID cards: avoiding compatibility issues

Two visually identical RFID credentials can be incompatible. Start with the installation that must read them, then confirm the exact technology before placing an order.

Key criteria to check

• Reader: record its manufacturer, reference and system version where available.
• Frequency and protocol: 125 kHz and 13.56 MHz are not interchangeable; a shared frequency does not guarantee a shared protocol.
• Chip: request the exact family and variant rather than a general label such as MIFARE.
• Data: establish whether the system reads an identifier or requires a particular application and encoding.
• Enrolment: identify who is authorised to assign access rights to new credentials.

Common mistakes

Colour, housing and memory capacity do not establish compatibility. Replacing a card with a key fob requires the same chip checks. More memory does not automatically make a credential suitable for an application designed for another reference.

A smartphone reading a tag is not proof that an access reader will accept it. The phone, its app and the final installation may use different information. Buying a blank credential also does not copy an existing user’s permissions.

Validate the choice on the actual system

Collect a previously approved order reference, reader documentation and your installer’s requirements. Technical advice helps identify a candidate; a representative test and system validation confirm whether it works in your setting.

Check reading, enrolment and permissions before deployment. Keep the validated reference for future replenishment.

Then compare the available white PVC RFID cards or ABS RFID key fobs. Check each selected variant and its minimum quantity before ordering. Standard products purchased online do not include activation in your installation.