ok just got off the phone to the rta, thought id post up my findings for anyone else who needs the info i the future, you just need a receipt with the buyer and sellers details, name address and the date and price that it was bought for, signed by both parties, if you cant get that then a stat dec from the buyer explaining the reasons why you can get or dont have a receipt, the price and date you bought it and then with the stat dec its up to the rta manager whether its accepted or not,
i guess if its not accepted you could pursue it further so yeh its not a lost cause, lucky me