How to receive a list of a partial view controller (ViewModel)

I have a partial view which receives a list from a controller, that view has a model (ViewModel) ... The problem is that the list does not arrive or does not result in the view ..

//ViewModel
namespace Proyecto_Libreria.Entidades
{
    public class Union
    {
        public Acreedor Acreedor { get; set; }
        public Pago Pago { get; set; }
    }
}

These are the entities that "come together" in the View

namespace Presupuestador_Libreria.Entidades
{
[Table("ACREEDOR")]
public class Acreedor: EntidadBaseSimple
{
    [Column("NOMBRE")]
    public String Nombre { get; set; }

    [Column("CONCEPTO")]
    public String Concepto { get; set; }
}
}

-

namespace Presupuestador_Libreria.Entidades
{
[Table("PAGO")]
public class Pago: EntidadBaseSimple
{
    [Column("ACREEDOR_ID")]
    [ForeignKey("acreedor")]
    public int Id_Acreedor { get; set; }

    [Column("NUM_FACT_ACREEDOR")]
    public String Factura { get; set; }

   public virtual Acreedor acreedor { get; set; }
}
}

This is the controller ...

public ActionResult Listar()
    {
        List<Acreedor> ListaAcreedor = _BDController.Acreedores.ToList().Where(s => s.Estado == "Activo").ToList();
        return View("Listar", ListaAcreedor);
    }

And this is the partial view where I have the problem, or the list does not arrive or I have an error when trying to go through it.

@using Proyecto_Libreria.Entidades;
@using Proyecto_Libreria.Controladores;
@model List<Acreedor_Pagos>
<table class="table table-striped">
<thead>
    <tr>
        <th>Acreedor</th>
        <th>Concepto</th>
</tr>
</thead>
<tbody>
    @foreach (Acreedor_Pagos obj in Model)
    {
        <tr>
            <th scope="row"> @obj.Acreedor.Nombre </th>
            <td> @obj.Acreedor.Concepto </td>
        </tr>
    }
</tbody>
</table>

What could be the error, thanks!