Somasi=legal notice
https://books.google.co.nz/books?id=GqTtCwAAQBAJ&pg=PA211&lp...

https://books.google.co.nz/books?id=DBLbHfO1_jIC&pg=PA157&lp...

http://www.proz.com/kudoz/indonesian_to_english/law_contract...

Somasi balik= counter notice
e.g. ... If you believe in good faith that a notice of copyright infringement has been wrongly filed against you, the DMCA permits you to send us a counter-notice. Notices and counter-notices must meet the then-current statutory requirements imposed by the DMCA ...
https://www.hertz.co.nz/rentacar/navigation/enUS/legalView.j...

... the content provider, member, or user, must send a counter-notice containing the following information ...
http://support.iconfinder.com/694-legal/2202-terms-of-servic...


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Note added at 1 hr (2016-07-30 03:49:53 GMT)
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Agak mirip: gugatan/tuntuan balik=counter claim
http://www.proz.com/?sp=gloss/term&id=21530285

https://books.google.co.nz/books?id=cF97F--suNAC&pg=PA333&lp...