LAWS OF MALAYSIA
Postal Services Act 2012 [ Act 741]
PART XIII - OFFENCES AND PENALTIES
Section 70. Tampering with official mark on a postal article
(1) No person shall - 
(a) put any wrong official mark on a postal article; or
(b) alter, remove or cause to disappear any official mark on a postal article.

(2) Any nperson who contravenes subsection (1) commits an offence and shall, on conviction, be liable to a fine not exceeding fifty thousand ringgit or to imprisonment for a term not exceeding six months or to both.