My partner and I split up after a 6 year relationship last October. We where due to get married in July 2007. But anyhow I haven't heard from her for about 8 months at all. I have just found out that she sent my brothers little girl a birthday card on the 28th August. My ex is her godmother from when we where together but she never really wanted anything to do with my brother or his family when we where together. It has upset my brothers girlfriend a bit and I think she just ripped the card up and through it in the bin. Is it a normal thing for an ex partner to do? Should I contact her and ask her not to send anything else or should I just let it go. I am trying the never contact her again aproach to the end of the relationship and surely if she wanted me to contact her she would get in touch with me and not send my niece a birthday card. Hmmm Should I just let it go?

Just because the two of you are not together does not mean she is still not that child's godmother. She did the right thing. The girls parents were being silly for tearing up the card. She left you, not the little girl. Those two things have nothing to do with each other.
Don't contact her. It's over. If the girl's parents have a problem with her, it's for them to handle, not you.

It is hard to gauge what she was attempting to do but it certainly does appear to be motivated by more then the child's birthday given her history. I still would not contact her and let it go but I wouldn't be surprised if you told us a Christmas card showed up for the first time from her this year. Perhaps after 8 months she is using the child as a way to wedge herself in a safe way back into your life. Ignore and continue to move forward.