How one can appoint his old employee on an honorarium basis and kindly advise about payment procedure?

Dear Sir, How one can appoint his old employee on an honorarium basis and kindly advise about payment procedure
regards

Dear Mr. Anil, we need to know whether you want to employ after his retirement or else. In that case you can employ him on consolidated salary basis. Above all, you are going to employ his on honorarium basis then where is question of payment procedure regarding.