You should ask the applicant to provide the correct name and mailing address for the recipient. This information can vary greatly, depending on the employer. You don't need to write a letter actually. If your current address and address on bank passbook both are same and you are staying on your current address. [Below briefly describe on Sample Address Proof Letter Format. You can follow these as a Sample cover letter to send address proof of your house, home.
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How to write a formal letter 📝 - All you need to know!