When you insert a date based merge field into a letter template, by default it will use the United States date formatting. If you need to change this please see the steps below.
[1] Go to the Reports and Templates section of ClinicOffice
[2] Right click on the letter template you use and select EDIT TEMPLATE
[3] Find the merge field for the date field (i.e. DOB)
[4] At the top, select the DATA MERGE tab
[5] Click SHOW FIELD CODES
[6] You should see something like this – {MERGEFIELD dob}
[7] You need to change it to this – {MERGEFIELD dob \@ “dd/MM/yyyy”}
(You can copy and paste this in over the existing one if you prefer)
[8] Once done, click the HOME tab at the top and SAVE TEMPLATE
[9] You should now be able to see the DOB in UK format.