diff --git a/Models/Repositories/PhSCustomerRepository.cs b/Models/Repositories/PhSCustomerRepository.cs
index c8456b0..509850c 100644
--- a/Models/Repositories/PhSCustomerRepository.cs
+++ b/Models/Repositories/PhSCustomerRepository.cs
@@ -54,7 +54,7 @@ namespace Models.Repositories
                 var loweredDoc = document.ToLower();
                 query = query.Where(c =>
                     c.PhSCustomerDocuments.Any(a =>
-                        a.DocumentNumber.Contains(loweredDoc))); // sin ToLower() acá
+                        EF.Functions.Like(a.DocumentNumber.ToLower(), $"%{loweredDoc}%")));
             }
             if (!string.IsNullOrWhiteSpace(email))
             {