What's the difference between MRZ scanning and NFC/chip reading?

MRZ scanning and NFC/chip reading are two distinct ways of getting data off a modern identity document, and they work quite differently under the hood, even though they're often used together in the same verification process.

MRZ scanning is fundamentally an optical process: a camera captures an image of the printed MRZ text, and OCR software extracts the characters from that image. It's reading printed ink on paper (or a laminated card), the same way you'd read any other text, just with a standardized format and font that makes automated recognition much more reliable than reading a name off a random label.

Because it's optical, MRZ scanning depends heavily on image quality, lighting, and document condition, as discussed elsewhere in this FAQ.

NFC/chip reading is a wireless data transfer, not an optical one. Many modern passports and some ID cards contain an embedded RFID chip that stores the same core identity data digitally, along with a photograph and, in many cases, a cryptographic digital signature that verifies the chip's contents haven't been altered.

A phone or reader with NFC capability can communicate with this chip over a short-range wireless connection, retrieving the stored data directly rather than reading printed text off the page. Critically, accessing the chip typically requires first reading the MRZ (or entering data manually), since the MRZ data is used to generate the access key that unlocks the chip under the Basic Access Control protocol defined in ICAO 9303.

This relationship is worth understanding: MRZ and chip reading aren't really competing methods, they're often sequential and complementary. MRZ scanning happens first, both to extract data directly and to generate the key needed to then read the chip.

The chip data is generally considered more tamper-resistant than printed MRZ data, since altering it undetectably would require breaking a cryptographic signature rather than just reprinting text, making chip reading a valuable additional layer of authenticity assurance when the document and reading hardware both support it.

ScanDoc's document scanning covers the MRZ and visual zone extraction side of this equation, giving businesses fast, reliable data capture from the printed document even in scenarios where NFC chip reading isn't available or practical, such as older non-chip documents or hardware that lacks NFC capability.