if she will travel with you or her mother, she wouldn't need a travel clearance.
regarding CFO i'm not really sure... but i did get a CFO sticker also for my son who is 4years old, he didn't attend the seminar but i did.
so i guess she'll need a seminar too, coz she's 15years old already.

This from the DSWD website regarding travel clearance:

Who need a Travel Clearance?
* A minor travelling alone to a foreign country.
* A minor travelling to a foreign country accompanied by a person other than his or her parents.

Who does not need Travel Clearance?
* All minors other than cited above, for example:

* A minor travelling to a foreign country with either parent or with his or her solo parent or legal guardian;
* A minor travelling abroad whose parents are in the Foreign Service or living abroad or are immigrants, provided he/she is holding a valid pass such as a dependents visa/pass/identification card or permanent resident visa/pass/identification card which serves as proof that he/she is living with parents abroad and their travel does not constitute child trafficking.

For CFO seminar.. try calling them

Cheers!