diff --git a/invoice_az/client/purchase_invoice.js b/invoice_az/client/purchase_invoice.js
index d6e9b66..31f38f3 100644
--- a/invoice_az/client/purchase_invoice.js
+++ b/invoice_az/client/purchase_invoice.js
@@ -623,8 +623,9 @@ frappe.ui.form.on('Purchase Invoice', {
     validate: function(frm) {
         // Client-side validation before save
         if ((frm.doc.purchase_type || frm.doc.agricultural_goods) && frm.doc.items) {
-            // Validate act_kind is selected
-            if (!frm.doc.act_kind) {
+            // Validate act_kind is selected — only required for a Purchase Act
+            // (matches the field's mandatory_depends_on).
+            if (frm.doc.act_type === 'Purchase Act' && !frm.doc.act_kind) {
                 frappe.msgprint({
                     title: __('Missing Act Kind'),
                     indicator: 'red',