Union Finance Minister Nirmala Sitharaman on Monday said GST compensation to some states is delayed due to non-availability of AG's authenticated certificate, and that Kerala has not sent even a single such certificate since 2017-18. Replying to a supplementary question, she also said that Rs 86,912 crore has been released for the Goods and Services Tax (GST) compensation payable to all states up to May 31, 2022.