diff --git a/app/Domains/Ticket/Services/AdminAppTicketService.php b/app/Domains/Ticket/Services/AdminAppTicketService.php
index 4f54759..55d3b80 100644
--- a/app/Domains/Ticket/Services/AdminAppTicketService.php
+++ b/app/Domains/Ticket/Services/AdminAppTicketService.php
@@ -80,14 +80,23 @@ class AdminAppTicketService
 
     public function cancel(Tenant $tenant, int $ticketId): Ticket
     {
-        $ticket = Ticket::query()
-            ->where('tenant_code', $tenant->codigo)
-            ->findOrFail($ticketId);
+        return DB::transaction(function () use ($tenant, $ticketId): Ticket {
+            $ticket = Ticket::query()
+                ->where('tenant_code', $tenant->codigo)
+                ->lockForUpdate()
+                ->findOrFail($ticketId);
 
-        $ticket->markAsCancelled();
-        $ticket->save();
+            if (! $ticket->can_cancel()) {
+                throw ValidationException::withMessages([
+                    'status' => 'El ticket debe estar activo para poder cancelarlo.',
+                ]);
+            }
 
-        return $ticket->refresh()->load(self::RELATIONS);
+            $ticket->markAsCancelled();
+            $ticket->save();
+
+            return $ticket->refresh()->load(self::RELATIONS);
+        });
     }
 
     public function refund(Tenant $tenant, int $ticketId, string $refundType): Ticket
@@ -100,6 +109,18 @@ class AdminAppTicketService
                 ->lockForUpdate()
                 ->findOrFail($ticketId);
 
+            if (! $ticket->can_refund()) {
+                if ($ticket->status !== Ticket::STATUS_ACTIVE) {
+                    throw ValidationException::withMessages([
+                        'status' => 'El ticket debe estar activo para poder reembolsarlo.',
+                    ]);
+                }
+
+                throw ValidationException::withMessages([
+                    'refund' => 'El reembolso no está disponible para este ticket.',
+                ]);
+            }
+
             $purchaseItem = PurchaseItem::query()
                 ->lockForUpdate()
                 ->find($ticket->source_purchase_item_id);