These people seem to be ambulance chasers.

I was in a car accident last week, I picked up the police report and the very next day they left me a calling card at home! So they don't know my number, but know where I live! What an invasion of privacy!

Here are the rest of the numbers from the card:
956-992-0335
956-992-0337
956-992-8906
956-618-4124
956-618-2013
956-686-9661