How To Write Application For Leaving Certificate?

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Respected principal,
With due respect I want to say that I want a leaving certificate , because I have some pursuits( you have to write those)kindly grant me so that my admission can be possible there. If you act on my request I shall be very thankful to you.

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I want to write an application for someone to collect my certificate on my behalf from another country

With due respect
my daughter passed out from your school from 3rd standard in the month of march

I want to inform you that we are shifting to some other place for that purpose I need school leaving certificate of my daughter

I write to you regarding for school leaving certificate to my son, who's studies in your school for two years

I beg to say that my son is study in your school and he passed out from your school.My transfer has been another country that why I want to a leaving certificate for my son.Kindly issue the certificate I will be very thankful to you.
  Your 's sincerely