I regularly see mistakes with phrases using the words “regards” or “respect”. There are several of these phrases in English, but they are easily confused and mixed up. For example, phrases like in respect to and with regards to are incorrect.
Here is a list of correct phrases (they all mean basically the same thing):
as regards (this is the only one with an s – “regards”)
in regard to (rare)
with regard to
in respect of
with respect to