I haven't heard any news from you about the certification
or
I haven't heard any news from you concerning the certification
or
I haven't heard any news from you in regards to the certification
29 Mayıs 2015
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Simply start with the subject pronoun. Leaving out the subject pronoun can be acceptable in informal emails, for example.
29 Mayıs 2015
0
0
Hâlâ cevap bulamadın mı?
Sorularını yaz ve ana dil konuşanlar sana yardım etsin!