Check Scanners Explained: MICR, Check 21 & Remote Deposit Capture
A check scanner captures front-and-back check images and reads the MICR line (routing, account, and check number) so checks can be deposited electronically under the Check 21 Act instead of as paper. Match the model to your volume: the Digital Check TellerScan TS240 (about 100 checks/minute) suits a teller window; the TS500 (about 300/minute) suits high-volume back-office work; the compact CheXpress CX30 suits low-volume small-business remote deposit capture. Reynolds Business Systems is an authorized Digital Check dealer providing installation, driver support, and integration across Pennsylvania and New Jersey.
If you accept checks — at a teller window, a back office, or a small business that wants to skip the trip to the bank — the hardware that makes electronic deposit possible is a check scanner. This guide explains what these devices actually do, the law that makes image-based deposit legal, and how to match a model to your real check volume. The facts here reflect the Digital Check and Panini scanners Reynolds sells and supports as an authorized dealer in Pennsylvania and New Jersey.
What a check scanner actually does
A check scanner does two jobs at once. First, it photographs the front and back of each check at the resolution banks require. Second, it reads the MICR line — the routing number, account number, and check number printed in magnetic ink along the bottom edge. Together, the images and the MICR data become the electronic record that replaces the paper check.
MICR vs. optical: MICR (Magnetic Ink Character Recognition) reads the magnetic ink characters on the bottom of a check and stays accurate even when items are stamped or overwritten. Optical reading uses camera-based character recognition. Modern check scanners use both together for maximum accuracy and fraud detection.
The Check 21 Act: why image deposit is legal
The Check Clearing for the 21st Century Act — “Check 21” — took effect in 2004 and lets banks exchange check images instead of shipping original paper. A Check 21-compliant scanner captures front and back images at the required resolution, runs image quality analysis (IQA), and produces the substitute-check data needed for electronic check exchange. Every Digital Check and Panini scanner Reynolds sells produces Check 21-compliant images.
Remote deposit capture (RDC)
Remote deposit capture is the workflow most businesses are really asking about. Instead of driving deposits to a branch, you scan checks at your own desk: the scanner captures the images, reads the MICR line, and securely transmits everything to your bank's RDC application, which credits your account electronically. The scanner is the front end; your bank's RDC software is the back end. Matching the two — and the driver and configuration that connect them — is where setup support matters.
Match the scanner to your check volume
The single most important sizing decision is throughput. Buying a back-office workhorse for a desk that sees a few checks a day wastes money; buying a compact single-feed for a busy teller line creates a bottleneck. The Digital Check line maps cleanly to volume:
| Model | Best for | Throughput / form factor |
|---|---|---|
| CheXpress CX30 | Low-volume small-business RDC | Compact single-feed desktop scanner |
| TellerScan TS240 | Teller window, hundreds of checks/day | About 100 checks per minute, feeder |
| TellerScan TS500 | Back office, thousands of items/day | About 300 checks per minute, high-volume feeder |
Daily capacity, not just rated speed, is the test. The TS240 comfortably handles a teller station's few hundred checks a day; the TS500 is built for back-office operations clearing thousands of items; the CX30 fits a small business depositing a modest stack each day.
Fraud detection and image quality
Beyond speed, modern check scanners protect the deposit. Common features include ultraviolet (UV) detection for check security features, image quality analysis to flag suspect items, duplicate detection to prevent double-processing, and MICR signal-strength analysis that helps identify altered checks. These integrate with your bank's fraud-detection software rather than replacing it.
The scanner is only half of remote deposit capture. The other half is the driver, the configuration, and the link to your bank's software — which is exactly where local support earns its keep.
Drivers, installation, and local support
A recurring search — and a recurring support call — is the TellerScan driver. Reynolds supports driver installation and updates for Digital Check TellerScan models including the TS240 and TS500, including remote installation help, firmware, and configuration. For banks and credit unions, we also assist with integrating the scanner into a core banking or RDC platform.
Where to go next
Ready to choose a model or get driver and integration help? See Reynolds' check scanner solutions for the full Digital Check and Panini line, or browse our
production document scanners if you also digitize paper records.
Sources Cited
3 REFS- U.S. Federal Reserve
