I have an issue with submit a form in partial view. Other forms are submit at the same time.

Controller:

[HttpPost, ValidateInput(false)]
    public ActionResult RenderShppingCart(Order model)
    {
        if (ModelState.IsValid && model != null)
        {
            if (User.Identity.Name == null || User.Identity.Name == "")
            {
                ModelState.AddModelError("", "Please login first!.");
                return CurrentUmbracoPage();
            } 

  in partial view

@using (Html.BeginUmbracoForm<ProductController>("RenderShppingCart", FormMethod.Post, new { id = "shippingform" }))

{ Checkout }

other partial view

    @using (Html.BeginUmbracoForm<SiteAccountController>("RenderLogin", FormMethod.Post, new { id = "loginform" }))
    {
        @Html.AntiForgeryToken()
        @Html.ValidationSummary(true, "", new { @class = "text-danger" })

Log in }