My mom was legally blind. A company came to her home and sold to her their goods and services. There was a singed contract between my mother and the company. My mother passed and I obtained the original contract of the sale. "I thought that if a person was blind, that in order for it to be a legal contract, a second signature was needed of friend or family member?" There are only three signatures on the contract: My Mother's and two representatives from that company. "Is that legal?"