UIN in gst

UIN stands for Unique Identity Number. It is the registration number given to certain specified persons , instead of GSTIN. These are:

A specialised agency of the United Nations Organisation or a multilateral financial institution and organisation notified under the United Nations (Privileges and immunities) Act, 1947. For example: IMF, UNESCO, WHO, etc.

Consulate or embassy of foreign countries

Any person notified by the Commissioner

These persons/organisations are not liable for taxes under the current GST regime in the Indian territory. Hence, any tax (direct or indirect) collected from such persons/bodies are refunded back to them.