diff --git a/app/Views/invoice_form.php b/app/Views/invoice_form.php
index ab6bc3b..840fbe2 100644
--- a/app/Views/invoice_form.php
+++ b/app/Views/invoice_form.php
@@ -355,8 +355,8 @@ $(document).ready(function(){
                     <div class="form-row">
                         <div class="form-group col-md-12">
                             <label for="cfname" class="col-form-label"><span class="contactPerson">Contact Person </span>Email<span class="text-danger"> *</span></label>
-                            <input type="text" class="form-control" id="cmail" name="cmail" value="<?= isset($receipt_details['email']) ? $receipt_details['email'] : '' ?>" placeholder="Email" required />
-                            <div class="invalid-feedback"> Please provide. </div>
+                            <input type="text" class="form-control" id="cmail" name="cmail" value="<?= isset($receipt_details['email']) ? $receipt_details['email'] : '' ?>" placeholder="Email"  onblur="validateEmailFormat(this.value)" />
+        <div class="invalid-feedback"> Please provide a valid email address. </div>
                         </div>
                     </div>
 
@@ -374,7 +374,8 @@ $(document).ready(function(){
                             <div class="input-group-prepend">
                                 <div class="input-group-text">+91</div>
                             </div>
-                            <input type="text" class="form-control" name="mobile" value="<?= isset($receipt_details['mobile_no']) ? $receipt_details['mobile_no'] : '' ?>" placeholder="Mobile Number (Enter only numbers)" required maxlength="10" onkeypress="return restriction(event)" />
+                            <input type="text" class="form-control" name="mobile" value="<?= isset($receipt_details['mobile_no']) ? $receipt_details['mobile_no'] : '' ?>" placeholder="Mobile Number (Enter only numbers)" required minlength="10" maxlength="10" onkeypress="return restriction(event)" />
+
                             <div class="invalid-feedback"> Please provide. </div>
                         </div>
                     </div>
@@ -389,7 +390,17 @@ $(document).ready(function(){
     </div><!-- /.modal-dialog -->
 </div><!-- /.modal -->
 
-
+<script>
+function validateEmailFormat(email) {
+    var emailPattern = /^(.+)@(gmail\.com|yahoo\.com|hotmail\.com|[^@]+\.com)$/i;
+
+if (!emailPattern.test(email)) {
+    alert("Please provide a valid email addres");
+    // You can also update the UI to indicate the error, e.g., by adding a class to the input field.
+    // Example: $('#cmail').addClass('is-invalid');
+}
+}
+</script>