Here's a copy of the letter...
Dear GNH:
Congratulations! I would like to welcome you to Northwest Airlines. We are pleased to confirm our conditional offer of employment to you for the position of Flight Officer. At this time, the effective date of your employment and scheduled training has yet to be determined. Once we have a confirmed class date, you will be contacted by our office. We will make every effort to provide you with a minimum of two months prior notice.
This offer is contingent upon compliance with the policies and regulations of the Company, state and federal laws, including your providing proof of identity and authorization to work in the United States. You must also successfully complete pre-employment DOT drug testing, CHRC fingerprinting and mandated criminal history records check, background investigation, request for historical verifications, including the requirements under the Pilot Records Improvement Act (PRIA) and a pre-employment medical examination. The timing of your medical examination will be based on your planned start date.
We look forward to you joining our NWA team.