Save the Children have announced they are severing all ties with internet firm ask.fm, following the death of old Hannah Smith.
The charity said the advertising was purchased as part of a bundle, and they were not aware of their connection with the site, which has been criticised following the suicide of the 14-year-old.
A spokesperson for the charity said:
We put the welfare of children first and as a result of the tragic case of Hannah Smith we no longer advertise on ask.fm.
The father of Hannah Smith, who committed suicide after being bullied on the Ask.fm website welcomes the site's new cybersafety measures.
Major organisations have withdrawn adverts on social networking site ask.fm following the suicide of teenager Hannah Smith.
Maybe it's time we all had a reality check, to look up from our screens, lose the masks we all wear online, and look at each other.