Gst Cash Invoices

Under gst there is no issue regarding the transaction mentioned above...........
you can duly take input tax credit of the purchases if you have valid tax invoice
As far as Gstr 1 is concerned the above transaction has nothing to do with it, your supplier will mention this invoice in his gstr 1......

As per income tax act payment to a single person in a single day shall not exceed 10,000 as the amount is exact 10000 you need not to worry about it as well.......

nothing to worry.. there is no default

thanks sir