Custom Messages using Checkwriter(XML)

Hi there

We would like to print custom messages on Checks generated using the Checkwriter(XML) program. These messages will be specific to a Location (not Organization) and may change in each pay cycle. Could someone please suggest the possible options we have to meet this requirement?

Below are the options we have considered so far.
1. Customize and Update the RTF Template file each week - Since a remote Payroll Admin would be updating the Message for each weekly pay cycle, it may not be the best solution to give access to the RTF template.

2. HR Orgaization - Payslip Info - The requirement is specific to a Location and not at a department/Org level. This would not suit the requirement.