diff --git a/back/methods/postcode/filter.js b/back/methods/postcode/filter.js
new file mode 100644
index 0000000000..53f25b7d41
--- /dev/null
+++ b/back/methods/postcode/filter.js
@@ -0,0 +1,34 @@
+
+module.exports = Self => {
+    Self.remoteMethod('filter', {
+        description:
+        'Find all postcodes of the model matched by postcode, town, province or country.',
+        accessType: 'READ',
+        returns: {
+            type: ['object'],
+            root: true,
+        },
+        http: {
+            path: `/filter`,
+            verb: 'GET',
+        },
+    });
+    Self.filter = async(ctx, filter, options) => {
+        const {Postcode} = Self.app.models;
+        let {value} = ctx.where;
+        let limit = ctx.where?.limit ?? 30;
+        return await Postcode.rawSql(`
+        SELECT pc.code, t.name as town, p.name as province , c.country
+        FROM postCode pc
+            JOIN town t on t.id = pc.townFk
+            JOIN province p on p.id = t.provinceFk
+            JOIN country c on c.id = p.countryFk
+        WHERE
+            pc.code like '%${value}%'
+            or t.name like '%${value}%'
+            or p.name like '%${value}%'
+            or c.country like '%${value}%'
+        LIMIT ${limit}
+        `);
+    };
+};
diff --git a/back/models/postcode.js b/back/models/postcode.js
index 4c1bf7fd77..63fd0657fc 100644
--- a/back/models/postcode.js
+++ b/back/models/postcode.js
@@ -1,38 +1,7 @@
 let UserError = require('vn-loopback/util/user-error');
 
 module.exports = Self => {
-    Self.remoteMethod('filter', {
-        description:
-        'Find all postcodes of the model matched by postcode, town, province or country.',
-        accessType: 'READ',
-        returns: {
-            type: ['object'],
-            root: true,
-        },
-        http: {
-            path: `/filter`,
-            verb: 'GET',
-        },
-    });
-    Self.filter = async(ctx, filter, options) => {
-        const {Postcode} = Self.app.models;
-        let {value} = ctx.where;
-        let limit = ctx.where?.limit ?? 30;
-        return await Postcode.rawSql(`
-        SELECT pc.code, t.name as town, p.name as province , c.country
-        FROM postCode pc
-            JOIN town t on t.id = pc.townFk
-            JOIN province p on p.id = t.provinceFk
-            JOIN country c on c.id = p.countryFk
-        WHERE
-            pc.code like '%${value}%'
-            or t.name like '%${value}%'
-            or p.name like '%${value}%'
-            or c.country like '%${value}%'
-        LIMIT ${limit}
-        `);
-    };
-
+    require('../methods/postcode/filter.js')(Self);
     Self.rewriteDbError(function(err) {
         if (err.code === 'ER_DUP_ENTRY')
             return new UserError(`This postcode already exists`);