Be sure to test your computer system closing processes to make sure all employees are educated on any additional steps needed during your transition period. Many systems automatically calculate penalties and closing amounts based on specific CD parameters. The screens may require manual changes to accommodate your new timelines until all CDs have been renewed under the new terms and the CD parameters updated.
Another option would be to establish new CD type codes with the appropriate new parameters and convert CDs as they mature. Obviously, the renewal notices would document this change.
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Life without Jesus is like an unsharpened pencil - it has no point.