Ducati ST4s Owner's Manual page 92

Code card
The keys come with a CODE CARD that reports:
A) (fig. 5) the electronic code to be used to start the
engine in the event of an emergency;
B) (fig. 5) the part no. code for the keys to be reported to
the DUCATI Service network when you are ordering any
duplicate keys.
E
Important
Keep the CODE CARD in a safe place. However, it
is advisable to keep the electronic code printed on the
CODE CARD handy when you ride your motorcycle, so
you will be able to start the engine in the event of an
emergency.
14
fig. 4.4
A B
fig. 5