From d8d68248b2fbe9810663df60f30240ffe3f9f804 Mon Sep 17 00:00:00 2001
From: Karting06 <Karting06@users.noreply.github.com>
Date: Sun, 21 Sep 2025 20:00:50 +0200
Subject: [PATCH] Fix VAT Syntax Checker for Belgian VAT numbers starting with
 1

---
 .../java/com/helger/masterdata/vat/VATINSyntaxChecker.java  | 6 ++----
 ph-masterdata/src/main/resources/codelists/vatin-data.xml   | 2 +-
 .../com/helger/masterdata/vat/VATINSyntaxCheckerTest.java   | 2 ++
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/ph-masterdata/src/main/java/com/helger/masterdata/vat/VATINSyntaxChecker.java b/ph-masterdata/src/main/java/com/helger/masterdata/vat/VATINSyntaxChecker.java
index 200173d6..9bc75216 100644
--- a/ph-masterdata/src/main/java/com/helger/masterdata/vat/VATINSyntaxChecker.java
+++ b/ph-masterdata/src/main/java/com/helger/masterdata/vat/VATINSyntaxChecker.java
@@ -327,11 +327,9 @@ public static boolean isValidVATIN_BE (@Nonnull final String sVATIN)
     final char [] c = sVATIN.toCharArray ();
     if (c.length != 10)
       return false;
-    if (c[0] != '0')
+    if (c[0] != '0' && c[0] != '1')
       return false;
-    if (!_isNum1to9 (c[1]))
-      return false;
-    for (int i = 2; i <= 9; ++i)
+    for (int i = 1; i <= 9; ++i)
       if (!_isNum (c[i]))
         return false;
 
diff --git a/ph-masterdata/src/main/resources/codelists/vatin-data.xml b/ph-masterdata/src/main/resources/codelists/vatin-data.xml
index b3db3a70..d90946f7 100644
--- a/ph-masterdata/src/main/resources/codelists/vatin-data.xml
+++ b/ph-masterdata/src/main/resources/codelists/vatin-data.xml
@@ -21,7 +21,7 @@
   <vatin country="AT" pattern="^ATU[0-9]{8}$">
     <example>ATU99999999</example>
   </vatin>
-  <vatin country="BE" pattern="^BE0[0-9]{9}$">
+  <vatin country="BE" pattern="^BE[0-1][0-9]{9}$">
     <example>BE0999999999</example>
   </vatin>
   <vatin country="BG" pattern="^BG[0-9]{9,10}$">
diff --git a/ph-masterdata/src/test/java/com/helger/masterdata/vat/VATINSyntaxCheckerTest.java b/ph-masterdata/src/test/java/com/helger/masterdata/vat/VATINSyntaxCheckerTest.java
index c527333d..6c6fec1b 100644
--- a/ph-masterdata/src/test/java/com/helger/masterdata/vat/VATINSyntaxCheckerTest.java
+++ b/ph-masterdata/src/test/java/com/helger/masterdata/vat/VATINSyntaxCheckerTest.java
@@ -42,6 +42,7 @@ public void testBasic ()
     assertFalse (VATINSyntaxChecker.isValidVATIN ("ATU63030067"));
 
     assertTrue (VATINSyntaxChecker.isValidVATIN ("BE0776091951"));
+    assertTrue (VATINSyntaxChecker.isValidVATIN ("BE1019887692"));
     assertFalse (VATINSyntaxChecker.isValidVATIN ("BE077609195"));
     assertFalse (VATINSyntaxChecker.isValidVATIN ("BE0776091962"));
     assertFalse (VATINSyntaxChecker.isValidVATIN ("BE2H000687700"));
@@ -279,6 +280,7 @@ public void testValid ()
     assertTrue (VATINSyntaxChecker.isValidVATIN ("BE0846985786"));
     assertTrue (VATINSyntaxChecker.isValidVATIN ("BE0875730549"));
     assertTrue (VATINSyntaxChecker.isValidVATIN ("BE0881858474"));
+    assertTrue (VATINSyntaxChecker.isValidVATIN ("BE1019887692"));
     assertTrue (VATINSyntaxChecker.isValidVATIN ("BG000220548"));
     assertTrue (VATINSyntaxChecker.isValidVATIN ("BG020983095"));
     assertTrue (VATINSyntaxChecker.isValidVATIN ("BG030122572"));