This generally will depend on the firm, the nature of the case, and how much money is at stake.
As an example, if clients have a weak case or if the amount of money that’s at stake is minimal, it’s possible they may have a hard time finding a firm that is willing to work on a contingency basis. On the other hand, if clients have a strong case and there are millions of dollars at stake, a firm may find it worth the risk to litigate the case on a contingency basis.
That said, even if clients have to cover attorney’s fees and costs up front, there is a chance they can recover these costs if they successfully prove their claim, especially in inheritance theft cases.
The best way to find out whether a firm will work with you on a contingency basis is to discuss your case with them.