[DATE, ex. Wednesday, June 11, 1998]

[NAME, BANK AND ADDRESS, ex.
John Smith
XYZ Bank
1234 First Street
Suite 567
Anycity, Anystate  85245] 

Dear [NAME, ex. John Smith],

We have recently removed [NAME AND TITLE OF SIGNING OFFICER BEING REMOVED, ie. Sara Smith, Controller] as a signing officer on our Account No. [ACCOUNT NO., ex. 12345678] effective immediately. Any checks or other account authorizations signed by [him / her] bearing a date on or after the date of this letter should not be honoured. 

Please amend your records forthwith.

Please note that all other signing officers, as per your records, remain the same. 

Sincerely, 

[YOUR NAME, ex. Jill Jones]