Canon VIXIA HF20 Instruction Manual page 166

Disposal
When you delete movies or initialize the built-in memory ( only) or
memory card, only the file allocation table is altered and stored data is
not physically erased. Take the necessary precautions when you dis-
pose of the camcorder or memory card, for example by physically
damaging it to prevent the leakage of private data.
If giving the camcorder or memory card to another person, initialize the
built-in memory ( only) or memory card using the [Complete Ini-
tialization] option ( 43). Fill it up with unimportant recordings, and
then initialize it again using the same option. This makes recovering the
original recordings very difficult.
166
Additional Information