Penal Code Section 230
230. “Coin” is metal used as money stamped and issued by the authority of the Government or by the authority of any State or sovereign power in order to be so used.
“Counterfeit” includes the causing of a genuine coin to appear like a different coin if it is done with the intention of practising deception or with the knowledge that deception will thereby be caused.
(a) Cowries are not coin.
(b) Lumps of unstamped metal, though used as money, are not coin.
(c) Medals are not coin, inasmuch as they are not intended to be used as money.
Please refer to the Attorney General's Chamber of Malaysia's website for the latest law.