Virgo wrote:Many sotapannas announced themselves to others before the Buddha could give his endorsement that what they said is the truth.
Do you have any examples? Especially of lay people?
Sure, both Sariputta and Maha Mogallana announced it when they attained it, which was before they even met the Buddha. At that time they did not yet have the names "Sariputta" and "Maha Mogallana". Sariputta learned dhamma from a monk, he then became a sotapanna and told Maha Mogallana that he had. He then travelled with Maha Mogallana to Sariputtas teacher at that time and they told him about it (and one can presume from the account that they told all of the monks disciples as well, because they all travelled with Maha Mogallana and Sariputta to go learn from this teacher of the deathless, the Arahant). Maha Mogallana also attained before they met the Buddha.
Simavati also attained the Dhamma-eye while listening to a talk of the Buddhas she attended and then told the Queen about it. She had worked for the King, buying flowers for Royal Funerals (I assume many funerals where held there for all sorts of important people, not just the Royal Family). Every time she would steal half of the money for the flowers and use the other half to purchase them. There was still a large amount of flowers and no one noticed. One day, the lady she bought the flowers from told her the Buddha would be giving a talk and they both attended. She attained sotapanna. After that, she was given money to buy flowers again for the dead, but this time she used it all and bought the full amount. When the Queen questioned her as to why there were so many, she admitted that she had stolen part of the money each time in the past, but that this time she purchased them all, she said she could not steal because she was a sotapanna.
Many other lay people have, but I don't have all the examples in front of me.