How does one know if it is false enlightenment, or one is really enlightened?
There is nothing called false enlightenment.
Enlightenment is there in your nature. Just like there is rice inside the paddy, knowledge is there within, you just need to remove the skin. Once this skin is removed, you will feel that you are not the body but the infinite. The mind is happy, content, and if you bless anyone, it will manifest.