The easiest way to get a copy of a prior RSA certificate is to go back to the registered training organisation that issued the certificate in the first place. They will be able to send you out a copy usually free of charge.
If you don't remember the name of the training organisation you could try checking at the website www.lostcertificate.com.au.
Or you could try contacting your State/Territory liquor authorities. You can find a link to each of the state authorities from the home page of our website www.onlinersa.com.au.
Alternatively, you could check your email correspondence with the RTO you completed the training or check your bank statement for details of who you paid for your course.
If it has been a while since you did your training it may be out of date. Courses are continually updated so please visit our website to see if you need to update your training www.onlinersa.com.au.