Dennis @ PerfectForms
There is no object built to this purpose. In the form that does the closing use a show form object and pass a custom parameter. In the form to be closed when the form opens set a helper field with the custom parameter. If it was not opened using the set field a 0 will set in the field. Change your workflow to route so that if your custom parameter is in the helper field move to closed. Then use a submit behavior.