Presumably you're talking about non-recourse lawsuit funding. You cannot expect that a company is going to give you a quick check, because they have to investigate your case to see if they have a high probability of recovering their money as part of an eventual judgment or settlement. They'll want a lot of documentation and usually also the cooperation of your lawyer.
Generally speaking, this should be a last resort source of funding - the amount you receive will be considerably less than the amount you'll end up paying out of a settlement or award.

