diff --git a/Models/Repositories/PhSCustomerRepository.cs b/Models/Repositories/PhSCustomerRepository.cs
index c064443..6681c93 100644
--- a/Models/Repositories/PhSCustomerRepository.cs
+++ b/Models/Repositories/PhSCustomerRepository.cs
@@ -51,10 +51,7 @@ namespace Models.Repositories
 
             if (!string.IsNullOrWhiteSpace(document))
             {
-                var loweredDoc = document.ToLower();
-                query = query.Where(c =>
-                    c.PhSCustomerDocuments.Any(d =>
-                        d.DocumentNumber.ToLower().Contains(loweredDoc)));
+                query = query.Where(c => c.PhSCustomerDocuments.Any(d => d.DocumentNumber.Contains(document)));
             }
 
             if (!string.IsNullOrWhiteSpace(email))