From

"EUROPEAN CONSUMER CENTRE OF GREECE"

there are 2 leaflets available in electronic format:

 

"Visiting Greece - Consumer rights in Greece"

&

"Shopping in Europe Guide" (only about Greece)

 

These leaflets could be very helpful because some shops

do not know the rules or just act as if they do not exist.

 

Both leaflets are very informative,

and we recommend reading both before visiting Greece.