This is my response to you:
1. The process for transferring of Patta is the same as that of registering a Patta Land;
2. The person who has bought the land must make an application to the Tehsildar regarding the transfer of name in the Patta;
3. The Tehsildar may either reject or may accept the application after examination of the property and the documents which have been submitted by the appellant;
4. If the NOC has to be obtained then the cost can be found from the tehsildar's office;
5. If the formalities and the paperwork is complete then you have nothing to worry;
6. Do not listen to the broker;
7. The tehsildar's opinion will be the best advise that you can get;
8. Only when all the clearances have been made, then go ahead and purchase the property.