What if the landlord hasn't given me a white card when I get to Serbia?

The solution to this situation is as follow:

1. Negotiate with the landlord: First of all, you can communicate with the landlord and see if they can handle the white card for you. If the landlord can't handle the white card for you, you can ask them if they can provide other help.

2. Consult the local immigration office: If the landlord can't help, you can go to the local immigration office to ask relevant questions. You need to provide your own identity documents and other necessary documents when consulting.

3. Seek legal help: If you think your rights and interests have been infringed, you can consider seeking the help of a local lawyer. Lawyers can help you understand your rights and provide you with legal support.