The authorities often go with address if they don’t have any other clues. When my mom died, she lived with her sister, who hates me and my sister… We found out by chance because my mom’s boss reached out to offer condolences, and then we had to call the coroner to let them know she had living kids. Her sister hadn’t revealed our existence.
It’s worth noting that those dyslexia typefaces are at best neutral for helping those with dyslexia. It’s a marketing thing. I did a deep dive on this recently.