---
title: A/B/C Compare Script
description: "A/B/C Compare lets you validate a scan by comparing two or three values against each other — for example, a scanned barcode against the answer to a follow-up question, instead of against another scan. Paste this script into a Custom…"
url: "https://www.codereadr.com/knowledgebase/a-b-c-compare-script/"
updated: "2026-09-14"
---

# A/B/C Compare Script

A/B/C Compare lets you validate a scan by comparing two or three values against each other — for example, a scanned barcode against the answer to a follow-up question, instead of against another scan. Paste this script into a Custom On-Device Validation (COV) script to turn it on.

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