Reg Free samples 2 concepts are read in the law.
1. Your free issue should not be further in the course of trade ie such free issues should not help to gain in the business/promotional free units nature then GST is free
2. If promotional free units the value should have been considered in the transactional value of the product for GST charging.
3. If the free units are to inter related person then GST is payable without any concession
4. However any free samples definitely GSTN should be declared or else it will be sale to unregistered entity