Depends on where you are and the details of your raffle.
For example, in the UK, some lotteries/raffles do not need a license. These include Work Lotteries (Office Pools) , Residents Lotteries (those living a a particular address) or Private Society Lotteries.
In some parts of Australia, raffles with prize pools under $30,000 do not need any permits.
For more Information, please read the Legal Bit section if your country appears in the list.
Please remember to check your local laws and ask your local authority before selling any tickets.