diff --git a/DoliMiddlewareApi/Controllers/InvoicesController.cs b/DoliMiddlewareApi/Controllers/InvoicesController.cs
index ebbb668..7de5683 100644
--- a/DoliMiddlewareApi/Controllers/InvoicesController.cs
+++ b/DoliMiddlewareApi/Controllers/InvoicesController.cs
@@ -26,9 +26,10 @@ public class InvoicesController : ControllerBase
     public async Task<ActionResult<List<InvoiceDto>>> GetInvoices(
         [FromQuery] int limit = 50,
         [FromQuery] [Range(1, int.MaxValue)] int page = 1,
-        [FromQuery] string? status = null)
+        [FromQuery] string? status = null,
+        [FromQuery] [StringLength(100)] string? search = null)
     {
-        var invoices = await _invoiceService.GetInvoicesAsync(limit, page, status);
+        var invoices = await _invoiceService.GetInvoicesAsync(limit, page, status, search);
         return Ok(invoices);
     }
 
@@ -76,4 +77,4 @@ public class InvoicesController : ControllerBase
         var result = await _invoiceService.AddInvoiceLineAsync(id, lineDto);
         return CreatedAtAction(nameof(GetInvoice), new { id }, result);
     }
-}
\ No newline at end of file
+}
diff --git a/DoliMiddlewareApi/Services/InvoiceService.cs b/DoliMiddlewareApi/Services/InvoiceService.cs
index d907283..c034df1 100644
--- a/DoliMiddlewareApi/Services/InvoiceService.cs
+++ b/DoliMiddlewareApi/Services/InvoiceService.cs
@@ -19,7 +19,8 @@ public class InvoiceService(IDolibarrApiClient apiClient)
     public async Task<List<InvoiceDto>> GetInvoicesAsync(
         int limit = 50,
         int page = 1,
-        string? status = null)
+        string? status = null,
+        string? search = null)
     {
         // empieza por 1 para el frontend
         var endpoint = $"invoices?limit={limit}&page={page - 1}";
@@ -29,6 +30,13 @@ public class InvoiceService(IDolibarrApiClient apiClient)
             endpoint += $"&status={status}";
         }
 
+        if (!string.IsNullOrWhiteSpace(search))
+        {
+            search=search.Trim().ToUpperInvariant();
+            var filter = $"(t.ref:like:'{search}%')";
+            endpoint += $"&sqlfilters={Uri.EscapeDataString(filter)}";
+        }
+        
         var dataList = await apiClient.GetCollectionAsync<InvoiceResponse>(endpoint);
         return dataList.Select(InvoiceMapper.MapToInvoiceDto).ToList();
     }
@@ -94,4 +102,4 @@ public class InvoiceService(IDolibarrApiClient apiClient)
 
         await apiClient.PutAsync($"invoices/{id}", current);
     }
-}
\ No newline at end of file
+}