Is garentee a common incorrect spelling of guarantee?
According to how-do-you-spell dot com, there are many common
misspellings of the word guarantee. Among these are garantee,
gaurantee, gaurentee, guaantee, guaarntee, guaranee, guaranete, and
guarante. The list goes on but no where on it is the misspelling
garentee. Therefore the short answer is no.