e.g when you lost the initial capital in the trade, are you mandated to pay back the full capital since the capital in lend from the prop firm, or do they provide some form of insurance for the money since your entry fee is already a collateral for the loan, we know how risky trading could be and there are no guarantee profits in trade so at that one need take time in checking and reading through all the terms and conditions of the company so that you won't get into something that is bigger than you can cover in terms of loses and taking large capital.
More also I will also like to get something clear.
There is a maximum amount of loss that is allowed for a funded account. Afaik, they would simply liquidate your account if it reaches the cap and that's when you've to start looking for a new account to trade with. You can do some research about it because I haven't actually gotten a prop firm account. My knowledge is mostly from my friends that own prop firm accounts. It's not often as good as people sugarcoat it to be.
Some prop firms offers users who pass their challenges a refund of their entry fees. Most prop first do not do that. I recently saw a statistics that show that prop firm actually makes money from registration fees compared to the actual profit split. It means that why a lot of people register for these challenges, only a handful actually passes them.