Client first settlement funding seems to be a real company, with a real website.
They have a BBB rating of "A"

We cannot tell you much more, since you did not tell us what was in the letters.

Receiving letters from this company and this is telephone number listed

I got the same call. I think it's a scam. Wouldn't identify a company name and can't trace the number.

Called my cell and said that court documents needs to be delievered. They also stated to call 1-888-649-9040. So they can get these papers out as soon as possible.