diff --git a/backend/src/helpers/CheckContactOpenTickets.ts b/backend/src/helpers/CheckContactOpenTickets.ts
new file mode 100644
index 0000000..0ebd556
--- /dev/null
+++ b/backend/src/helpers/CheckContactOpenTickets.ts
@@ -0,0 +1,17 @@
+import { Op } from "sequelize";
+import AppError from "../errors/AppError";
+import Ticket from "../models/Ticket";
+
+const CheckContactOpenTickets = async (contactId: number): Promise<void> => {
+  const ticket = await Ticket.findOne({
+    where: { contactId, status: { [Op.or]: ["open", "pending"] } }
+  });
+
+  if (ticket) {
+    throw new AppError(
+      "There's already an open or pending ticket for this contact."
+    );
+  }
+};
+
+export default CheckContactOpenTickets;
diff --git a/backend/src/services/TicketServices/CreateTicketService.ts b/backend/src/services/TicketServices/CreateTicketService.ts
index 9131669..5abffdd 100644
--- a/backend/src/services/TicketServices/CreateTicketService.ts
+++ b/backend/src/services/TicketServices/CreateTicketService.ts
@@ -1,4 +1,5 @@
 import AppError from "../../errors/AppError";
+import CheckContactOpenTickets from "../../helpers/CheckContactOpenTickets";
 import GetDefaultWhatsApp from "../../helpers/GetDefaultWhatsApp";
 import Ticket from "../../models/Ticket";
 
@@ -19,6 +20,8 @@ const CreateTicketService = async ({
     throw new AppError("No default WhatsApp found. Check Connection page.");
   }
 
+  await CheckContactOpenTickets(contactId);
+
   const { id }: Ticket = await defaultWhatsapp.$create("ticket", {
     contactId,
     status,