how to my name on my kids birth certificates?

hey i was just wanting to know how do i put my name on my two girls birth certificates as the mother didnt put them on there an i didnt know an we have just broken up but i wanna be there for my kids an make sure i have rights to see them and that she cant leave the contry as she has treaten me that she is going over sea's for 3 months an i want to be able to see my two girls as i have been there for them since they were born..

how do i apply to put my name on their certificates???
can someone help me please ?

You need to see a lawyer and begin the process to have a parenting order put in place.

It is not hard to do, you just need to go through the process.