Tasreeh is the Hajj Permit from the Ministry of Hajj which makes you eligible to perform Hajj. Without tasreeh you are considered doing illegal Hajj as per Saudi Government Law.
To check if your Hajj Permit (tasreeh) has been issued by the Ministry of Hajj you can visit the following link:
UN: What about hajj tasreeh?I have paid fees but still tasreeh not available
Ans: Tasreeh is usually available a few days b4 hajj, if u hav checked through the above process then u can contact ur agent to find out when the tasreeh will be available