MALAYSIAN 'DENDA' STAMPS WITH 'PUSAT MEL MELAKA' POSTMARK

I get this cover last week. 

The sender didn't put the right postage rate. 

He put only RM0.30 (30 sen) but the normal postage in Malaysia is RM0.60 (60 sen).

MALAYSIA, Denda, 20 sen


Other postmark in Melaka that I have:
MELAKA
[Alor Gajah] [Asahan] [Ayer Keroh][Jalan Laksamana]
[Jasin] [Kuala Sungai Baharu] [Masjid Tanah]
[Malacca] [Melaka] [Merlimau] [Pusat Mel Melaka]
[PPB Melaka] [Selandar] [Serkam] [Tangga Batu]
[Tanjong Kling] [Tmn Melaka Raya] [Ujong Pasir]