How to Avoid Counterfeit ACR122U / ACR1552U NFC Readers: A Buyer’s Guide

The ACR122U‘s end-of-life status has led to counterfeit units on the market. Here’s how to spot them and where to buy genuine ACS readers.

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If you’ve searched for an ACR122U recently, you may have noticed prices and packaging that look inconsistent from listing to listing. That’s not an accident. Because ACS has designated the ACR122U end-of-life, genuine new stock is limited — and that gap has been filled in places by unofficial and counterfeit units sold under the same name. Here’s what to actually check before you buy.

Why counterfeits exist specifically for this reader

Counterfeiting tends to follow demand for products that are hard to source genuinely. The ACR122U is a perfect target: it’s still widely referenced in tutorials, SDKs, and existing deployments, so demand hasn’t disappeared even though genuine manufacturing has slowed. The same risk applies, to a lesser degree, to any high-demand reader nearing end-of-life.

What a counterfeit unit actually costs you

A non-genuine reader isn’t just a legal or ethical grey area — it has real functional downsides:

• Inconsistent read range and reliability. Counterfeit RF front-ends often don’t match ACS’s tuning, so cards that work fine on a genuine unit may read intermittently.
• No manufacturer warranty or support. If the reader fails, or the driver doesn’t behave as documented, there’s no ACS support path.
• Firmware and driver mismatches. Genuine ACS drivers are built and signed against genuine hardware IDs; a counterfeit board may present the right USB ID while behaving differently underneath, causing subtle bugs that are hard to diagnose.
• Compliance risk. If your application needs EMV, PC/SC certification, or similar compliance chains for a business or government deployment, a counterfeit reader breaks that chain even if it appears to work.

How to check what you’re buying

• Ask for the supplier’s sourcing. A supplier who can name where their stock comes from (direct from ACS, an authorized distributor) is a good sign. Vague answers are a red flag.
• Compare the price to the market range. If a listing is dramatically cheaper than everyone else’s for a supposedly identical unit, that’s the most common tell.
• Check the physical markings. Genuine ACS units carry consistent branding, model numbers, and certification markings (CE, FCC, RoHS, etc. — see our ACR122U spec sheet for what should be present).
• Test against the official driver. A genuine reader installs cleanly with ACS’s published PC/SC driver and shows the correct device ID in Device Manager / lsusb. If it needs a modified or unofficial driver to work, that’s a strong signal something’s off.

The better long-term move: switch to the ACR1552U

Since the ACR122U is end-of-life, the more durable fix for new purchases isn’t just “find a genuine ACR122U” — it’s moving to the ACR1552U, ACS’s actively supported successor with full manufacturer backing. See our ACR122U vs ACR1552U comparison if you’re deciding.

Buying genuine

BSD InfoTech sources ACR122U and ACR1552U stock as an authorized supplier and can speak to exactly what you’re getting. If a deal looks too good elsewhere, it’s worth a second opinion before you commit to a bulk order.

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Need genuine ACR122U or ACR1552U readers, in single units or bulk? Contact BSD InfoTech.