The young girl was fined while travelling with her ten-year-old sister, as The Local reported last week.
Under Swiss rules, children under six travel free, but only if they are accompanied by someone aged 12 or older.
Was the ticket inspector right to fine the five year old for travelling without a ticket?
Speaking about the case, Switzerland’s public transport union CH-Direct said the ticket inspector had acted correctly, but added there was “scope for discretion”.
The decision to fine the girl stirred plenty of debate among readers of The Local as can be see in the comments section of our Facebook post here.