"or if not" and "if yes" punctuation



I am not sure if I have correctly put the punctuation in the following sentences: "Do you happen to have the contact information of Mr N, or if not, is there a way you could get that? If yes, could you please send me his contact info ASAP?". 

Also, is it correct to follow the sentence with an "or if not" with a "if yes"?

Many thanks! Astra

punctuation sentences or if asked Mar 15 '13 at 09:54 Astra New member

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