Work / Test period for work in Poland [2]

Hi all ,
I have been offered for job in Krakow ,I have 3 months test period ,if both parties are satisfied we will continue ,i want to think about bad one ,let's assume that they didnt like me ,will I able to search new job ? I mean how long my previous employee will provide work permit ? just 3 months ?

Work / Poland work permit and visa fee if cancelled [6]

Hi I have an offer ,I will come to Poland in August and start to work ,my recruiter asked my to send copy of my passport in order to prepare visa and work permit ,I have also second work chance in another company ,I am in 3rd stage ,this job is actually my dream job and I want to work there much ,my question is like that ,if I send them my passport and if they start to apply to work and visa permit and then suddenly i will say them I am not able to come because i have better offer ? Will it cost them a lot ? I know that it is rude :( Please help me