From bdb2ac79e942ebe711078ba831d4f0ac75cc0c1f Mon Sep 17 00:00:00 2001
From: Samuel Moelius <samuel.moelius@trailofbits.com>
Date: Wed, 15 Jul 2026 06:20:56 -0400
Subject: [PATCH] fix(isPassportNumber): support case-insensitive country codes

---
 src/lib/isPassportNumber.js |  5 +++--
 test/validators.test.js     | 22 ++++++++++++++++++++++
 2 files changed, 25 insertions(+), 2 deletions(-)

diff --git a/src/lib/isPassportNumber.js b/src/lib/isPassportNumber.js
index aa0724cd7..c8373e80d 100644
--- a/src/lib/isPassportNumber.js
+++ b/src/lib/isPassportNumber.js
@@ -83,7 +83,8 @@ export default function isPassportNumber(str, countryCode) {
   assertString(str);
   /** Remove All Whitespaces, Convert to UPPERCASE */
   const normalizedStr = str.replace(/\s/g, '').toUpperCase();
+  const normalizedCountryCode = countryCode.toUpperCase();
 
-  return (countryCode.toUpperCase() in passportRegexByCountryCode) &&
-    passportRegexByCountryCode[countryCode].test(normalizedStr);
+  return (normalizedCountryCode in passportRegexByCountryCode) &&
+    passportRegexByCountryCode[normalizedCountryCode].test(normalizedStr);
 }
diff --git a/test/validators.test.js b/test/validators.test.js
index f489105dd..10c1c40ca 100644
--- a/test/validators.test.js
+++ b/test/validators.test.js
@@ -3243,6 +3243,28 @@ describe('Validators', () => {
       ],
     });
 
+    test({
+      validator: 'isPassportNumber',
+      args: ['am'],
+      valid: [
+        'AF0549358',
+      ],
+      invalid: [
+        'A1054935',
+      ],
+    });
+
+    test({
+      validator: 'isPassportNumber',
+      args: ['aM'],
+      valid: [
+        'AF0549358',
+      ],
+      invalid: [
+        'A1054935',
+      ],
+    });
+
 
     test({
       validator: 'isPassportNumber',