You are able to amend the message to the email you send out with the payslips attached.
- Navigate to the Payroll config record for the subsidiary in question and open in edit mode: Accessing the Payroll Configuration (Payroll Config) Record
- Add the message in the "Email Payslip Body" field under the Company Info section.
This will update for all the payslips from the time you edit. If your employees only access their payslips through the ESS centre they will not receive this message.