some 25 years or so ago I contacted a person by phone, at the time only 3 people in England with that surname, I knew he was a relation, he was not best pleased, but gave him all of the ways to contact me to prove I was genuine, next evening I heard from his brother who said straight away "we are indeed cousins" a short time after his father rang, I corresponded with both of these family member till the father died and the son died just this week, it was a very rewarding relationship and I will miss both of them, the person who I originally contacted is still alive, still in contact but not so interested in the family tree and he did apologise about our initial conversation.
I also approached 2 other people by letter and we corresponded till they both died
Never contacted anyone else in any other way, some people don't want to be contacted as I found from my initial phone call but I am glad I did it
Louisa Maud