I have seen your questions and the reply from Mr. Rajeev. A company registered under the companies Act is a juristic person. Change in the name of the company does not alter its position as it is the similar to your changing your name. All the assets and liabilities, rights and obligations continue to be operative even after the change of name. What you have said in your question about mentioning "susccessors, assigns, etc" would come in only when there is a change in the constituion of the company, i.e., change of control by acquisition of shares. Had the situation/laws been that a person will have no rights and obligations or assets and liabilities when once he changes his name, then there would have been chaos and I am sure that lot number of people would have resorted to that. So, whether there is any mention or not in the agreement, the company, with the change in the name also, is bound by the rights and obligations mentioned in the agreement. It is obligatory on the part of the company to keep the Government who is a party to the agreement informed of the change in name, just as you inform about the change in address.