POST method called on MVC UserControls as well as their parent views

System.Web.Mvc.dll!System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod

<% Html.RenderAction("ContactUsForm", "Company",
   new { commentsBoxHeader = "Questions" }); %>

[AcceptVerbs(HttpVerbs.Post)]
public ActionResult ContactUsForm(FormCollection formdata)

[AcceptVerbs(HttpVerbs.Post)]
    public ActionResultContactUsForm(FormCollection formData)
    {
        if (formData["btnSubmitContactUsForm"] == null) {

            // "This form is not for us!";
            // figure out how (if is possible) to return the get default view here
            // and call it with the right arguments
        }
    }

$(document).ready( function() {
    $('#mybutton').click( function() {
       $('form').submit();
    });
});