Hi @preethigovi ,

Please use script below and try.

function onSubmit() {

    var reportsToManager = g_form.getValue('does_the_proposed_delegate_report_to_the_manager');
    if (reportsToManager == 'No') {
        if (!g_form.hasAttachments()) {
    
            g_form.addErrorMessage(getMessage('You must attach a confirmation message from your proposed delegates manager with this ticket before proceeding.'));
            return false;
        }
    }

    // If the answer is 'Yes', or if it's 'No' and attachments DO exist, allow submission.
    return true;
}

Regards,

Vishal