EDIT: I have now configured a dictionary which has solved this problem
I am working on a profile to import the gifts we get via the JustGiving website. A number of these gifts are anonymous, and in this case the excel sheet we download from JustGiving leaves the forename and surname fields blank.
We would like these gifts to go on the 'Anonymous' profile that we have already created. Is there a way for me to make it so that if the 'Surname' field on the CSV file which I upload is blank, it automatically populates the surname field with 'Anonymous'?