[quote OrangeTortoise]@phantomgirl22 I didn't realise this was such a contentious issue! Surely you should tell them?![/quote]
Well yes and the people who do choose to tell react like you to this. Personally I think it's wrong. When I was researching using a donor I found a site that is for diner conceived children, well teens abs adults. There was a document with 100's of statements from donor conceived people where they had to say one thing to someone who was considering this. Pretty much all of them said be honest, be open. Do it but be honest.
You would be amazed at how many people don't. I would actually estimate is at least 50% of people possibly more. On a fertility forum there is a separate section for those "not telling" you can only post there by signing a disclaimer of sorts that states your intentions. Without that no one can access it. It's because it's so hotly contentious that they want an area to support those who are not telling.
Many people go to Europe, often Spain, Greece, or the Czech Republic where the laws on anonymity are different. Basically there you know only the age of the donor, maybe hair and eye colour, nothing else. When they have had a successful pregnancy they basically destroy any evidence of this, all payments, documentation from clinics and when back in the UK they do not disclose their fertility treatment with the maternity services or their GP. It's basically wiped out.
A lot of people go overseas as here in the UK anonymity is not allowed. So when you are going through fertility treatment your donor is not known, but when children are 18 they have the legal right to trace their donor and donor siblings too. There is a big legal and ethical stance here where all data is logged and children on turning 18 just go to the organisation that holds their data and they are given full details. Many people do not like this.
For us we used an agency that recruits egg donors and it's stance is that they don't get paid anything other than expenses because they want people to donate Altruistically. They want people do be very open and receptive to potential off spring approaching then when 18. This was important to me, if my child wants to find and meet his donor and form a relationship with her then I want that to be as easy as possible and I wanted her to be receptive to this. I know an awful lot about her, her occupation, her family situation, her like and dislikes, and have photos of her as a baby and toddler. We bought her a gift from me and my DH and one from my first born and gave it via the clinic. I am very confident that should my son want to pursue this then it will be fine. I myself would even like to meet her.
As you can see it's very different approaches to the same thing. A hot topic in the fertility world!