Record Transfer Services/Priority Express Documents

Priority Express Documents or PXDocuments sent me a letter about helping me and my brothers get the deed to our mothers house as she has passed away. We have been working with a Lawyer already and we have the deed . They want us to send them $83.00 processing fee. They sent this to me in the mail no real business info listed but the number they gave of 888-344-3626 goes the business I listed website. The other info listed on their website is an email of [email protected]. The letter states they are at 3835 E Thousand Oaks Blvd CA 91362. My brother told me he got a letter like this a few months ago and it is a scam. HOW do they know my families info ? Only name they seem to have in this letter is Record Transfer Services