Correct spelling, explanation: this word is of Latin origin (recommendare; from word commendare) and as such is spelled in a similar way. Therefore we do not spell this word with double c. Form reccommend is incorrect and the correct one is recommend.

Definition of recommend:
verb, to advise someone to do something, buy or use a certain product, etc.
My aunt recommended me this online shop and I am very satisfied with it.
I recommend you use the metro to get to my place. It’s the fastest way.

Incorrect spelling, explanation: recommend should be spelled with one c just like its Latin original recommendare. Writing it with double c, as in reccommend, is a mistake. Recommend is the only correct form.

Incorrect spelling

Incorrect spelling