Is custodial documents required for my step daughter from the biological father to travel from Jamaica where she was born accompanied by her mother.

I am a Canadian citizen with dual citizenship with Jamaica. I married my wife who is a Jamaican citizen 3 years ago April 20, 2013. She has a son 18 years old and a daughter 15 whose birthday is coming Dec 20, 1016. The biological father of the daughter has been absent from her life since the mother separated from him almost 6 years ago in 2010. She was living common law with the biological father approximately 11 from 1999 to 2010. I am planning a family class sponsorship of my wife. As the legal stepfather travelling to Jamaica to return with my family which includes my step son who has already legally adopted my surname, step daughter and wife. Will my wife and I be able to avoid having to acquire a consent letter for our daughter to travel with us to Canada? Will the sponsorship board overlook the need for a legal agreement? We don't think it is necessary but we will have a hard time finding the biological father. He is a violent person she prefers to avoid.