diff --git a/app/resources/routes/04_ventas.php b/app/resources/routes/04_ventas.php
index 8ab4684..003d2af 100644
--- a/app/resources/routes/04_ventas.php
+++ b/app/resources/routes/04_ventas.php
@@ -28,6 +28,9 @@ $app->group('/venta/{venta_id:[0-9]+}', function($app) {
         });
         $app->get('[/]', [Ventas::class, 'pie']);
     });
+    $app->group('/escritura', function($app) {
+        $app->get('/add[/]', [Ventas\Escrituras::class, 'add']);
+    });
     $app->get('/escriturar[/]', [Ventas::class, 'escriturar']);
     $app->get('/desistir[/]', [Ventas::class, 'desistir']);
     $app->get('/desistida[/]', [Ventas::class, 'desistida']);
diff --git a/app/resources/routes/api/ventas.php b/app/resources/routes/api/ventas.php
index a4acb3a..d3e2c7a 100644
--- a/app/resources/routes/api/ventas.php
+++ b/app/resources/routes/api/ventas.php
@@ -19,11 +19,17 @@ $app->group('/ventas', function($app) {
     $app->group('/escrituras', function($app) {
         $app->post('/estados[/]', [Ventas::class, 'escrituras']);
     });
+    $app->group('/by', function($app) {
+        $app->get('/unidad/{unidad_id}', [Ventas::class, 'unidad']);
+    });
     $app->post('[/]', [Ventas::class, 'proyecto']);
 });
 $app->group('/venta/{venta_id}', function($app) {
     $app->get('/unidades[/]', [Ventas::class, 'unidades']);
     $app->get('/comentarios[/]', [Ventas::class, 'comentarios']);
+    $app->group('/escritura', function($app) {
+        $app->post('/add[/]', [Ventas\Escrituras::class, 'add']);
+    });
     $app->post('/escriturar[/]', [Ventas::class, 'escriturar']);
     $app->group('/desistir', function($app) {
         $app->get('/eliminar[/]', [Ventas::class, 'insistir']);
diff --git a/app/resources/views/ventas/escrituras/add.blade.php b/app/resources/views/ventas/escrituras/add.blade.php
new file mode 100644
index 0000000..24234a4
--- /dev/null
+++ b/app/resources/views/ventas/escrituras/add.blade.php
@@ -0,0 +1,153 @@
+@extends('ventas.base')
+
+@section('venta_subtitle')
+    Agregar Abono en Escritura
+@endsection
+
+@section('venta_content')
+    <div class="ui basic segment">
+        <p>Valor Promesa {{$format->ufs($venta->valor)}}</p>
+        @if (isset($venta->formaPago()->pie))
+            <p>Valor Anticipo {{$format->ufs($venta->formaPago()->pie->valor)}}</p>
+        @endif
+        @if (isset($venta->formaPago()->credito))
+            <p>Crédito {{$format->ufs($venta->formaPago()->credito->pago->valor())}}</p>
+        @endif
+    </div>
+    <form class="ui form" id="add_form">
+        <div class="three wide field">
+            <label for="fecha">Fecha</label>
+            <div class="ui calendar" id="fecha">
+                <div class="ui left icon input">
+                    <i class="calendar icon"></i>
+                    <input type="text" name="fecha" />
+                </div>
+            </div>
+        </div>
+        <div class="fields">
+            <div class="field">
+                <label for="valor">Valor</label>
+                <div class="ui labeled input" id="valor">
+                    <div class="ui basic label">$</div>
+                    <input type="text" name="valor" />
+                </div>
+            </div>
+            <div class="field">
+                <div class="ui checkbox" id="uf">
+                    <input type="checkbox" name="uf" />
+                    <label>Valor en UFs</label>
+                </div>
+            </div>
+        </div>
+        <div class="fields">
+            <div class="three wide field">
+                <label for="bancos">Banco</label>
+                <div class="ui search selection dropdown" id="bancos">
+                    <input type="hidden" name="banco" />
+                    <i class="dropdown icon"></i>
+                    <div class="default text">Banco</div>
+                    <div class="menu">
+                    @foreach ($bancos as $banco)
+                        <div class="item" data-value="{{$banco->id}}">{{$banco->nombre}}</div>
+                    @endforeach
+                    </div>
+                </div>
+            </div>
+            <div class="fields">
+                <div class="field">
+                    <div class="ui radio checkbox">
+                        <input type="radio" name="tipo" value="1" checked="checked" />
+                        <label>Cheque</label>
+                    </div>
+                </div>
+                <div class="field">
+                    <div class="ui radio checkbox">
+                        <input type="radio" name="tipo" value="3" />
+                        <label>Vale Vista</label>
+                    </div>
+                </div>
+            </div>
+        </div>
+        <button class="ui button">Agregar</button>
+    </form>
+@endsection
+
+@push('page_scripts')
+    <script>
+        const escritura = {
+            ids: {},
+            add() {
+                return {
+                    escritura: event => {
+                        event.preventDefault()
+                        const body = new FormData(event.currentTarget)
+                        const fecha = $(this.ids.fecha).calendar('get date')
+                        body.set('fecha', [fecha.getFullYear(), fecha.getMonth()+1, fecha.getDate()].join('-'))
+                        const status = $(this.ids.checkbox).checkbox('is checked')
+                        body.set('uf', status)
+
+                        const url = '{{$urls->api}}/venta/{{$venta->id}}/escritura/add'
+                        fetchAPI(url, {method: 'post', body}).then(response => {
+                            if (!response) {
+                                return
+                            }
+                            return response.json().then(json => {
+                                if (json.status) {
+                                    window.location = '{{$urls->base}}/venta/{{$venta->id}}'
+                                }
+                            })
+                        })
+                        return false
+                    }
+                }
+            },
+            toggle() {
+                return {
+                    checkbox: () => {
+                        const status = $(this.ids.checkbox).checkbox('is checked')
+                        if (status) {
+                            return this.toggle().uf()
+                        }
+                        return this.toggle().pesos()
+                    },
+                    uf: () => {
+                        const valor = $(this.ids.valor)
+                        valor.attr('class', 'ui right labeled input')
+                        valor.find('.label').remove()
+                        valor.append(
+                            $('<div></div>').addClass('ui basic label').html('UF')
+                        )
+                    },
+                    pesos: () => {
+                        const valor = $(this.ids.valor)
+                        valor.attr('class', 'ui labeled input')
+                        valor.find('.label').remove()
+                        valor.prepend(
+                            $('<div></div>').addClass('ui basic label').html('$')
+                        )
+                    }
+                }
+            },
+            setup(ids) {
+                this.ids = ids
+
+                $(this.ids.fecha).calendar(calendar_date_options)
+                $(this.ids.checkbox).checkbox({
+                    fireOnInit: true,
+                    onChange: this.toggle().checkbox
+                })
+                $(this.ids.bancos).dropdown()
+                $(this.ids.form).submit(this.add().escritura)
+            }
+        }
+        $(document).ready(() => {
+            escritura.setup({
+                form: '#add_form',
+                fecha: '#fecha',
+                checkbox: '#uf',
+                valor: '#valor',
+                bancos: '#bancos'
+            })
+        })
+    </script>
+@endpush
diff --git a/app/src/Controller/API/Ventas/Escrituras.php b/app/src/Controller/API/Ventas/Escrituras.php
index 1776fc4..ad7f1cc 100644
--- a/app/src/Controller/API/Ventas/Escrituras.php
+++ b/app/src/Controller/API/Ventas/Escrituras.php
@@ -13,6 +13,50 @@ class Escrituras
 {
     use withJson;
 
+    public function add(ServerRequestInterface $request, ResponseInterface $response,
+                        Repository\Venta $ventaRepository, Service\Venta $ventaService,
+                        Repository\Venta\Escritura $escrituraRepository, Service\Venta\Pago $pagoService,
+                        Service\UF $ufService, int $venta_id): ResponseInterface
+    {
+        $body = $request->getParsedBody();
+        $output = [
+            'venta_id' => $venta_id,
+            'input' => $body,
+            'status' => false
+        ];
+        try {
+            $venta = $ventaService->getById($venta_id);
+            if (isset($venta->formaPago()->escritura)) {
+                throw new EmptyResult('');
+            }
+            $fecha = new DateTimeImmutable($body['fecha']);
+            $uf = $ufService->get($fecha);
+            $valor = $body['valor'];
+            if (str_contains($valor, ',')) {
+                $valor = str_replace(['.', ','], ['', '.'], $valor);
+            }
+            $valor = ((float) $valor) * (($body['uf']) ? $uf : 1);
+            $data = [
+                'fecha' => $fecha->format('Y-m-d'),
+                'valor' => $valor,
+                'banco' => $body['banco'],
+                'tipo' => $body['tipo'],
+                'uf' => $uf
+            ];
+            $pago = $pagoService->add($data);
+            $data = [
+                'valor' => $valor,
+                'fecha' => $fecha->format('Y-m-d'),
+                'uf' => $uf,
+                'pago' => $pago->id
+            ];
+            $escritura = $escrituraRepository->create($data);
+            $escrituraRepository->save($escritura);
+            $ventaRepository->edit($venta, ['escritura' => $escritura->id]);
+            $output['status'] = true;
+        } catch (EmptyResult) {}
+        return $this->withJson($response, $output);
+    }
     public function edit(ServerRequestInterface $request, ResponseInterface $response,
                          Service\Venta          $ventaService, Repository\Venta\EstadoVenta $estadoVentaRepository,
                          int                    $venta_id): ResponseInterface
diff --git a/app/src/Controller/Ventas/Escrituras.php b/app/src/Controller/Ventas/Escrituras.php
index feb9f89..86fcd62 100644
--- a/app/src/Controller/Ventas/Escrituras.php
+++ b/app/src/Controller/Ventas/Escrituras.php
@@ -4,6 +4,7 @@ namespace Incoviba\Controller\Ventas;
 use Psr\Http\Message\ResponseInterface;
 use Psr\Http\Message\ServerRequestInterface;
 use Incoviba\Common\Alias\View;
+use Incoviba\Repository;
 use Incoviba\Service;
 
 class Escrituras
@@ -20,4 +21,12 @@ class Escrituras
         $venta = $ventaService->getById($venta_id);
         return $view->render($response, 'ventas.escrituras.informe', compact('venta'));
     }
+    public function add(ServerRequestInterface $request, ResponseInterface $response, View $view,
+                        Service\Venta $ventaService, Repository\Banco $bancoRepository,
+                        int $venta_id): ResponseInterface
+    {
+        $venta = $ventaService->getById($venta_id);
+        $bancos = $bancoRepository->fetchAll('nombre');
+        return $view->render($response, 'ventas.escrituras.add', compact('venta', 'bancos'));
+    }
 }
diff --git a/app/src/Model/Venta/FormaPago.php b/app/src/Model/Venta/FormaPago.php
index 497ce05..fe6d2de 100644
--- a/app/src/Model/Venta/FormaPago.php
+++ b/app/src/Model/Venta/FormaPago.php
@@ -26,6 +26,17 @@ class FormaPago implements JsonSerializable
         }
         return $sum;
     }
+    public function prometido(string $moneda = Pago::UF): float
+    {
+        $sum = 0;
+        if (isset($this->pie)) {
+            $sum += $this->pie->valor($moneda);
+        }
+        if (isset($this->escritura)) {
+            $sum += $this->escritura->pago->valor($moneda);
+        }
+        return $sum;
+    }
     public function total(string $moneda = Pago::UF): float
     {
         $sum = $this->anticipo($moneda);
diff --git a/app/src/Model/Venta/Pie.php b/app/src/Model/Venta/Pie.php
index ec3f11d..cdae691 100644
--- a/app/src/Model/Venta/Pie.php
+++ b/app/src/Model/Venta/Pie.php
@@ -33,14 +33,19 @@ class Pie extends Model
         });
     }
 
+    public function valor(string $moneda = Pago::UF): float
+    {
+        $proporcion = $this->proporcion();
+        if ($this->asociado !== null) {
+            return $this->asociado->valor($moneda) * $proporcion;
+        }
+        return array_reduce($this->cuotas(), function(float $sum, Cuota $cuota) use ($moneda) {
+                return $sum + $cuota->pago->valor($moneda);
+            }, 0) * $proporcion;
+    }
     public function pagado(string $moneda = Pago::UF): float
     {
-        $proporcion = 1;
-        if (count($this->asociados()) > 0) {
-            $proporcion = $this->valor / ((($this->asociado) ? $this->asociado->valor : $this->valor) + array_reduce($this->asociados(), function(float $sum, Pie $pie) {
-                return $sum + $pie->valor;
-            }, 0));
-        }
+        $proporcion = $this->proporcion();
         if ($this->asociado !== null) {
             return $this->asociado->pagado($moneda) * $proporcion;
         }
@@ -49,6 +54,17 @@ class Pie extends Model
             return $sum + $cuota->pago->valor($moneda);
         }, 0) * $proporcion;
     }
+    protected function proporcion(): float
+    {
+        $proporcion = 1;
+        if (count($this->asociados()) > 0) {
+            $proporcion = $this->valor / ((($this->asociado) ? $this->asociado->valor : $this->valor) + array_reduce($this->asociados(), function(float $sum, Pie $pie) {
+                        return $sum + $pie->valor;
+                    }, 0));
+        }
+        return $proporcion;
+    }
+
     public ?array $asociados;
     public function asociados(): array
     {
diff --git a/app/src/Repository/Venta/EstadoVenta.php b/app/src/Repository/Venta/EstadoVenta.php
index caaaba6..07e7820 100644
--- a/app/src/Repository/Venta/EstadoVenta.php
+++ b/app/src/Repository/Venta/EstadoVenta.php
@@ -47,15 +47,19 @@ class EstadoVenta extends Ideal\Repository
 
     public function fetchByVenta(int $venta_id): array
     {
-        $query = "SELECT * FROM `{$this->getTable()}` WHERE `venta` = ?";
+        $query = $this->connection->getQueryBuilder()
+            ->select()
+            ->from($this->getTable())
+            ->where('venta = ?');
         return $this->fetchMany($query, [$venta_id]);
     }
     public function fetchCurrentByVenta(int $venta_id): Model\Venta\EstadoVenta
     {
-        $query = "SELECT a.*
-FROM `{$this->getTable()}` a
-    JOIN (SELECT MAX(`id`) AS 'id', `venta` FROM `{$this->getTable()}` GROUP BY `venta`) e0 ON e0.`id` = a.`id`
-WHERE a.`venta` = ?";
+        $query = $this->connection->getQueryBuilder()
+            ->select('a.*')
+            ->from("{$this->getTable()} a")
+            ->joined("JOIN (SELECT MAX(id) AS id, venta FROM {$this->getTable()} GROUP BY venta) ev0 ON ev0.id = a.id")
+            ->where('a.venta = ?');
         return $this->fetchOne($query, [$venta_id]);
     }
 }