Hi Jasmine , I´m not from colombia but it´s usually called Certificado de Antecedentes Penales o Informe de antecedentes penales/judiciales in most spainsh speaking countries.
So: Certificado de buena conducta , doesn´t seem right. It would be a paper that says that you´ve behaved well, but i don´t think such thing exists.
Saludos