In India, an NGO (Non-Governmental Organization) can be registered under various acts. Some of the commonly used acts for NGO registration are:

1. Societies Registration Act, 1860: This act is used to register a society that is formed for charitable purposes. Societies are generally formed by a group of people who come together to work towards a common social or charitable cause.

2. Trusts Act, 1882: This act is used to register a trust which is formed for charitable purposes. A trust is generally formed by a person or a group of persons who donate some property to be held in trust for charitable purposes.

3. Companies Act, 2013: Section 8 companies can be registered under the Companies Act, 2013 for non-profit purposes. These companies are formed with the objective of promoting commerce, art, science, sports, education, research, social welfare, religion, charity or any other useful purpose.

It is important to note that the process of registration and the requirements for registration may vary depending on the specific act under which the NGO is being registered.