Can you help me on how to prepare a letter of no objection allowing a employee to get married?

- a employee requires a No Objection Letter from his employer to be submitted to his National Embassy.
To whom it may concern

I have no objection to my employee Tom Katt getting married.

(Signed) Anonymous (your address, phone number and date).

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Can you help me on how to prepare or ask a letter of no objection for my sponsor.

Thank you. .