Just queried this with DETE this week and this is the reply I got:
"The employer is obliged to give you a written statement of terms and conditions in the first two months of your employment. If he doesn't provide a statement, you could take a case to a Rights Commissioner to get one."
I have been working for my present company for just over 5 years and have never received a contract. I even composed one and typed it up but my employer has never signed it!! The company has over 50 employees and as far as I know no-one has ever received a contract. It comes up for discussion every so often and then just dies away again.
I am thinking of leaving in the next few months so it suits me at the moment not to have a contract, as I am only obliged to give one week's notice without a contract. One week will not be sufficient to find a replacement let alone train them - but that won't be my problem!