Should i write a letter to his mother and father? If so???

You have all my sympathy - we hear so much about single mothers and single fathers are barely mentioned, but they are just as much responsible as the mother for bringing a child into the world and should accept that responsibility.
I think you should contact his parents, saying you thought they would like to know that they have a lovely grandchild, enclose a photo, and tell them briefly how you met their son and what arrangements you have made with him. Tough if he doesn't want them to know - or perhaps he has told them and they have been reluctant to contact you.
If they do not respond, you have lost nothing, but you may gain friends, allies and grandparents for the child.

could be opening a can of worms. Proceed with caution, he could be a married man with a family hence the fear of CSA. If there is already an established family the parents may not know about the one night stand.

What a dilemma! If I found out that my son had fathered a secret child I would want to know and would do my damnedest to get him to be responsible. BUT if there were an established family I'd hate the trauma that might be inflicted on grandchildren I already knew and loved. Can you find out if he is in a serious relationship/ has children? By this I don't mean your child is any less important, but circumstances would dictate your next steps.

If I was the grandparent, I would want to know, no matter how upsetting it could be if there was already a family elsewhere. This child has a right to know that she has grandparents. As harrigran says, proceed with caution. Perhaps let him know you have contacted his parents for the reasons you have given - it will give him chance to inform anyone he needs to, and explain himself.

If it was my son who had fathered a child and not let me know, I would be extremely upset and disappointed in him, and would want to see him demonstrate that he is taking responsibility for the child, including ensuring the child is welcomed into the family.

I agree with Greatnan and Carol in this, Rachypoos. Of course, it's possible that the man's parents do already know, but have no way of contacting you.
I would want to know if my son had fathered a child, and it's the child's right to know its grandparents and have them in its life should that be possible and appropriate. My granddaughter has a little boy, and although she and her partner split up after about a year, his parents see the baby very regularly and buy him clothes now and again. This is just as well, because the child's father pays £25 per week for him (apparently this is all he has to pay). Quite easy really, I suppose - father a baby, leave the mother and child and only have to pay £25 towards his keep! He already has a child by another girl, and pays the same for him too. ! Take care in how you approach the situation, though. Try not to shock or make them angry, because that may be their immediate reaction if they don't already know - or even if they do! I don't think you have anything to lose - good luck.

I agree with everything that's been said, but just think you should do the groundwork first to minimise potential hurt. If you are considering writing to the parents, does that mean you already have an address?

I don't mean to sound unfriendly - this is just a query. I thought this forum was for grandparents yet I see lots of input from parents. Fair enough if you are asking a question concerning grandparents but surely this thread could go onto Mumsnet. My DIL wouldn't dream of posting a message here. Sorry if I sound nasty I don't mean to but I am just puzzled by it.

I don't see a problem with anyone asking a bit of advice in order to get a grandparent's perspective on a problem, though, dorsetpennt. In other words, would we as grandparents want to know and how may we react if we were in that same position?

As grandparents I think most of us would wish to know about a little carrier of our genes. At the same time, we might be a bit protective of our son.

I discussed this question with my family last night and the consensus was that the grandparents have a right to know and that you have a duty to your daughter to at least attempt to establish a relationship with her grandparents. My son thought it might be wise to write to the father first and inform him that you will be contacting the grandparents to tell them of the existence of their grandchild. This will give him the opportunity to talk to his parents if he chooses so that it won't come completely out of the blue.
If my son had fathered a child I would definitely want to know sooner rather than later. In my experience as a social worker it's girls who generally want to 'know' about family relationships and if in the future your daughter decides to trace her paternal family it's better that the grandparents are already aware of her existence. Best case scenario is that she develops a relationship with the GPs and at worst nothing has been lost for her.

I often pop over to Mumsnet and have a look, posted once as well. I like new Mums posting on here asking questions looking for help. I think you should contact his parents you have nothing to lose by doing so. Write a nice letter and send a photo and leave it to them to reply.

I have no problem about Mums posting on this forum. Rather touching really that some of the young mums think that we have still have something to offer

I think do a bit of research first. In these days of the internet there is quite a lot of info out there. I would not want these folk to become a problem to you, demanding things of you.
I know it is difficult being on your own and not having someone else to share parental ups and downs with. So is it this perhaps that is tugging at you to initiate this relationship.

Thank you all so much for your comments, and as i do not have any contact with my daughters father, not even a phone number as he has decided to delete it!!! I cannot contact him to discuss my actions. This isnt about whether he has his own family/relationships etc, that is irrelevant as he doesnt want to know the exisistance of his daughter. I wrote on this forum as i wanted the opinions of granparents and thought it would be a good start in getting abit of guidance on whether this was the disision to do. i know what i want to do in my heart for my daughters sake and nobody elses. But just wanted your thoughts on this matter. I know his parents name hence and what area they are from as i have looked in up on the electrol list for that area. I can pay through a website for their address as i know his mothers and father full name as i had to get my daughters fathers birth certificate. I thank you all very very much for your thoughts and concern, it is very much appreciated. Thank you

Whatever you decide, I hope the outcome is a happy one for all involved. I for one am glad you felt able to set your thoughts down here and I hope we have helped you to think things through.

Hope it all goes well for you and your little girl.