How Do I Professionally Draft an Appointment Memo for an Outsourcing Firm?

I need a sample Appointment MEMO to inform the outsourcing company to issue the offer letter for the selected candidate. If anyone can provide me with details, it would be a great help.

For example, ABC Ltd has awarded a contract to the outsourcing company XYZ Ltd. XYZ Ltd (Outsourcing firm) has sent a qualified candidate for an interview with ABC Ltd. After the interview process, ABC Ltd has selected the best-qualified candidate.

Now, I have to send a MEMO as an Appointment to XYZ Ltd (Outsourcing Company) stating that Mr. [Candidate's Name] has been selected for the position of [Position Title]. Please raise the offer and contract agreement and confirm the joining date.

I am a little confused about how to draft this in a professional way. Your help will be highly appreciated. Thank you.

3rd March 2012

To Daniel Smith, CEO Global Recruitment Consultants Washington DC

From Samuel Jackson, Recruitment Manager ABC Company Ltd

Subject: Appointment of Candidate Ms. Juliana Smith for Analyst Position

This is with reference to the application we received for the HR Analyst position. We are pleased to appoint Ms. Juliana Smith as an HR Analyst with ABC Ltd. Kindly raise the offer and employment contract to Ms. Juliana. Please confirm the joining date with us once the offer has been accepted.

Best Regards,
Samuel Jackson