Someone has forged my signature on withdrawal application and submitted it, and DHA has withdrawn my 491 application, what can I do?

In such a situation, you should take immediate action to address the forgery and the withdrawal of your application. Here are some steps you can take:

1. **Contact DHA:** Reach out to the relevant department or office at DHA (Department of Home Affairs) immediately. Explain the situation and provide any evidence you have that your signature was forged.

2. **File a Complaint:** File a formal complaint with DHA regarding the forgery of your signature and the unauthorized withdrawal of your application.

3. **Legal Assistance:** Consider seeking legal advice or assistance from a lawyer specializing in immigration or forgery cases. They can guide you on the legal options available to you and help protect your rights.

4. **Document Everything:** Keep records of all communications, documents, and evidence related to the forgery and withdrawal of your application. This documentation will be valuable in proving your case.

5. **Follow up:** Stay proactive and follow up with DHA regularly to ensure that your complaint is being addressed and that corrective actions are taken.

It's crucial to act swiftly and decisively in such situations to minimize any potential negative impacts on your immigration application.