diff --git a/app/Http/Controllers/CreditController.php b/app/Http/Controllers/CreditController.php
index 346dda1ee391..74b46011fea4 100644
--- a/app/Http/Controllers/CreditController.php
+++ b/app/Http/Controllers/CreditController.php
@@ -14,6 +14,7 @@ use App\Http\Requests\Credit\EditCreditRequest;
 use App\Http\Requests\Credit\ShowCreditRequest;
 use App\Http\Requests\Credit\StoreCreditRequest;
 use App\Http\Requests\Credit\UpdateCreditRequest;
+use App\Http\Requests\Credit\UploadCreditRequest;
 use App\Jobs\Entity\EmailEntity;
 use App\Jobs\Invoice\EmailCredit;
 use App\Models\Client;
@@ -24,6 +25,7 @@ use App\Transformers\CreditTransformer;
 use App\Utils\Ninja;
 use App\Utils\TempFile;
 use App\Utils\Traits\MakesHash;
+use App\Utils\Traits\SavesDocuments;
 use Illuminate\Http\Response;
 
 /**
@@ -32,7 +34,8 @@ use Illuminate\Http\Response;
 class CreditController extends BaseController
 {
     use MakesHash;
-
+    use SavesDocuments;
+    
     protected $entity_type = Credit::class;
 
     protected $entity_transformer = CreditTransformer::class;
@@ -576,4 +579,66 @@ class CreditController extends BaseController
 
         return response()->download($file_path);
     }
+
+    /**
+     * Update the specified resource in storage.
+     *
+     * @param UploadCreditRequest $request
+     * @param Credit $client
+     * @return Response
+     *
+     *
+     *
+     * @OA\Put(
+     *      path="/api/v1/credits/{id}/upload",
+     *      operationId="uploadCredits",
+     *      tags={"credits"},
+     *      summary="Uploads a document to a credit",
+     *      description="Handles the uploading of a document to a credit",
+     *      @OA\Parameter(ref="#/components/parameters/X-Api-Secret"),
+     *      @OA\Parameter(ref="#/components/parameters/X-Api-Token"),
+     *      @OA\Parameter(ref="#/components/parameters/X-Requested-With"),
+     *      @OA\Parameter(ref="#/components/parameters/include"),
+     *      @OA\Parameter(
+     *          name="id",
+     *          in="path",
+     *          description="The Credit Hashed ID",
+     *          example="D2J234DFA",
+     *          required=true,
+     *          @OA\Schema(
+     *              type="string",
+     *              format="string",
+     *          ),
+     *      ),
+     *      @OA\Response(
+     *          response=200,
+     *          description="Returns the Credit object",
+     *          @OA\Header(header="X-MINIMUM-CLIENT-VERSION", ref="#/components/headers/X-MINIMUM-CLIENT-VERSION"),
+     *          @OA\Header(header="X-RateLimit-Remaining", ref="#/components/headers/X-RateLimit-Remaining"),
+     *          @OA\Header(header="X-RateLimit-Limit", ref="#/components/headers/X-RateLimit-Limit"),
+     *          @OA\JsonContent(ref="#/components/schemas/Credit"),
+     *       ),
+     *       @OA\Response(
+     *          response=422,
+     *          description="Validation error",
+     *          @OA\JsonContent(ref="#/components/schemas/ValidationError"),
+     *
+     *       ),
+     *       @OA\Response(
+     *           response="default",
+     *           description="Unexpected Error",
+     *           @OA\JsonContent(ref="#/components/schemas/Error"),
+     *       ),
+     *     )
+     */
+    public function upload(UploadCreditRequest $request, Credit $credit)
+    {
+
+        if ($request->has('documents')) 
+            $this->saveDocuments($request->file('documents'), $credit);
+
+        return $this->itemResponse($credit->fresh());
+
+    }
+
 }
diff --git a/app/Http/Requests/Credit/UploadCreditRequest.php b/app/Http/Requests/Credit/UploadCreditRequest.php
new file mode 100644
index 000000000000..d50a8ddc70dc
--- /dev/null
+++ b/app/Http/Requests/Credit/UploadCreditRequest.php
@@ -0,0 +1,39 @@
+<?php
+/**
+ * Invoice Ninja (https://invoiceninja.com).
+ *
+ * @link https://github.com/invoiceninja/invoiceninja source repository
+ *
+ * @copyright Copyright (c) 2021. Invoice Ninja LLC (https://invoiceninja.com)
+ *
+ * @license https://opensource.org/licenses/AAL
+ */
+
+namespace App\Http\Requests\Credit;
+
+use App\Http\Requests\Request;
+
+class UploadCreditRequest extends Request
+{
+    /**
+     * Determine if the user is authorized to make this request.
+     *
+     * @return bool
+     */
+    public function authorize() : bool
+    {
+        return auth()->user()->can('edit', $this->credit);
+    }
+
+    public function rules()
+    {
+
+    	$rules = [];
+
+		if($this->input('documents'))
+            $rules['documents'] = 'file|mimes:html,csv,png,ai,svg,jpeg,tiff,pdf,gif,psd,txt,doc,xls,ppt,xlsx,docx,pptx|max:2000000';
+
+    	return $rules;
+
+    }
+}
diff --git a/routes/api.php b/routes/api.php
index f21f23c56c75..c54b9c6ffae3 100644
--- a/routes/api.php
+++ b/routes/api.php
@@ -47,6 +47,7 @@ Route::group(['middleware' => ['api_db', 'token_auth', 'locale'], 'prefix' => 'a
     Route::post('invoices/bulk', 'InvoiceController@bulk')->name('invoices.bulk');
 
     Route::resource('credits', 'CreditController'); // name = (credits. index / create / show / update / destroy / edit
+    Route::put('credits/{credit}/upload', 'CreditController@upload')->name('credits.upload');
 
     Route::get('credits/{credit}/{action}', 'CreditController@action')->name('credits.action');