Originally Posted by
bocastephen
Does Malaysia have an outbound immigration check at the causeway bridge linking it to Singapore? If not, wouldn't just driving to/from SIN and flying through there eliminate many of the issues of whose passport you entered/exited with?
Malaysia has outbound immigration checks at all borders.
However, many Malaysians with dual passports travel overseas via Singapore. Malaysia<->Singapore, they use the Malaysian passports, which thus gets the Singapore stamps. Singapore<->US, they exit Singapore on the Malaysian passport but use the US passport to enter the US (and show it if requested at check-in) --> as far as Malaysia is concerned, they're just visiting Singapore, which requires no advance visa.