diff --git a/src/whatsapp/abstract/abstract.router.ts b/src/whatsapp/abstract/abstract.router.ts
index bf1eee1b..136b946a 100644
--- a/src/whatsapp/abstract/abstract.router.ts
+++ b/src/whatsapp/abstract/abstract.router.ts
@@ -104,16 +104,24 @@ export abstract class RouterBroker {
     const instance = request.params as unknown as InstanceDto;
     const body = request.body;
 
-    if (!body?.groupJid) {
-      if (request.query.groupJid) {
-        Object.assign(body, {
-          groupJid: request.query.groupJid,
-        });
+    let groupJid = body?.groupJid;
+    
+    if (!groupJid) {
+      if (request.query?.groupJid) {
+        groupJid = request.query.groupJid;
       } else {
         throw new BadRequestException('The group id needs to be informed in the query', 'ex: "groupJid=120362@g.us"');
       }
     }
-
+    
+    if (!groupJid.endsWith('@g.us')) {
+      groupJid = groupJid + '@g.us';
+    }
+    
+    Object.assign(body, {
+      groupJid: groupJid
+    });
+    
     const ref = new ClassRef();
 
     Object.assign(ref, body);
diff --git a/src/whatsapp/controllers/instance.controller.ts b/src/whatsapp/controllers/instance.controller.ts
index e45644fe..64867a2d 100644
--- a/src/whatsapp/controllers/instance.controller.ts
+++ b/src/whatsapp/controllers/instance.controller.ts
@@ -55,19 +55,12 @@ export class InstanceController {
     try {
       this.logger.verbose('requested createInstance from ' + instanceName + ' instance');
 
-      if (instanceName !== instanceName.toLowerCase().replace(/[^a-z0-9]/g, '')) {
-        throw new BadRequestException('The instance name must be lowercase and without special characters');
-      }
-
       this.logger.verbose('checking duplicate token');
       await this.authService.checkDuplicateToken(token);
 
       this.logger.verbose('creating instance');
       const instance = new WAStartupService(this.configService, this.eventEmitter, this.repository, this.cache);
-      instance.instanceName = instanceName
-        .toLowerCase()
-        .replace(/[^a-z0-9]/g, '')
-        .replace(' ', '');
+      instance.instanceName = instanceName;
 
       this.logger.verbose('instance: ' + instance.instanceName + ' created');