Aside from recommending you simplify your IF statement, I believe your issue is with the curly quotes around your date format.
CONCATENATE(
IF({Full Name copy}, {Full Name copy}, Org),
" - $", {Received Amount},
" - ", IF({Date Received}, DATETIME_FORMAT({Date Received}, "D/M/YYYY"))
)
The IF around the date format will avoid errors for when no date is inputted.