Guides to determine fake RM1 coins

Seeing an article from yesterday's newspaper about someone exchanging RM 160 or something like that and only received RM 130 in returns. The balance was said to be fakes. So how does the public can identify the fakes? Are we at the discression of the Banks? For them to tell us which are fakes and which aren't?!?

So to say, when we are bringin our load to exchange for notes, we're at the mercy of the bank and the 'trusted' machine that sorts the coins?!? How real can that be? Furthermore these 'fakes' will be detained by the bank and will not be returned for fear it will be circulated.

Are the employees at these bank trustable? What if they have found a flaw in the system and they could reap in a small fortune in midst of this incident... Newspapers has written that the public would require to show their identification when exchanging RM500 or more worth of coins... Wow, its like informing, dun bring all yer coins at a go if you don't want to be identified...

I think there should be more transparency in this issue.. don't you think?