I have discovered about 3 years ago, that I have a birth sibling through my mother who was given up for adoption. Unfortunately I was disowned from my mother at the age of 18 so I have no way of contacting my birth mother to get any information from. I need some advice on how I would go about searching for this sibling. I have very little information to go by. I know where the child would of been born, a rough timeline. I do not have an exact date of birth.
I'm not sure how I would go about getting any vital information that could help me. I'm also not sure if birth siblings have any legal rights to search or what would be involved. I would appreciate any information I can get.