Tifing or Tiffing: How To spell?

The word Tifing is misspelled against Tiffing, which is present continuous of "Tiff"

Tiffing has double "ff" is mispronounced as "f"
Remember double 'FF' in between the strings Ti & ing which should not be misspelled with single 'F'
Wrong Spelling: Ti-f-ing
Correct Spelling: Ti-ff-ing
Find more wrongly spelled words of Tiffing to spell it well.