Dear Juan Dela Cruz,

John Dela Cruz   is an honored guest of our
corporation, and during his stay at your hotel, you are
hereby authorized to forward all bills for his stay there
to our accounting office.  They have been preauthorized
to immediately approve and pay any invoices from your
hotel.  We have placed a credit limit on the account of
[amount]  Should this account exceed this amount, please
contact this office for approval in advance of any
additional charges.

Thank you in advance for your special consideration of
this individual and his needs.  We hope to make his visit
to our company and our city most enjoyable and memorable.

If I may be of any assistance in this matter, please
contact my office as necessary.