Applying for children not included on original sponsorship application

[Playa08]

Hello, I am looking for advice on how to apply for permanent residency for children that weren't included on the original application. My friend came to Canada as a permanent resident but did not sponsor his kids at the time due to custody issues. He had to sign a letter stating they will never be eligible to be sponsored in the future. I am wondering if anyone else has been in this situation and if the letter can be revoked?

Thank you

 

[canuck78]

There is unfortunately nothing you can do. He signed the document and was aware that he was giving up the right to sponsor his children.