If you have received a job offer from someone without asking for anything, it is very likely to be a scam or otherwise false. Several scam emails circulate on the internet using names of well-known companies (including ours) to send job offers often written in approximate Italian and with many grammatical errors.
When in doubt, before responding, it is always good to inform yourself by searching on the internet or in Facebook groups.
Remember that if someone asks you for money for a job, it's definitely a scam... it doesn't matter the reason you have to pay, whether it's an airplane ticket, a stamp, or a tax, no compensation should be requested from you to be able to work.