The lard works in mysterious ways...like UPS...nothing more mysterious than that...
Maybe your mom filled out a form, or if your mom lives with you, maybe she gave the church a check with her address on it.
Do they know your mom?
When we first moved here when I was 18, our local parish priest (from a good 5 minute drive away and many houses and streets in between) visited us at home to welcome us - after our first mass at the church. When I think now, I have a feeling that he spoke to my mom after mass - when he noticed that we were new. Priests often bid goodbye to everyone at the exit after mass.
Looks more like they found there spiritual home mcdonalds
i was partly joking