A man calls upon other than Allah; I informed him that this is shirk (associating partners with Allah)

Question:
A man calls upon other than Allah, so I informed him that this act is shirk (associating partners with Allah), but he did not respond. Do I declare him to be a mushrik (one who associates partners with Allah), or is it necessary that a scholar from among the scholars must rule on him as such?

Answer:
We do not know what ruling to issue regarding him until we hear his words and investigate his condition. Is he of sound mind, or is he not accepted? It is not necessary that this be done by him; rather, it is necessary that he be referred to the people of knowledge. The people of knowledge in his country should be informed about him so that they may take the necessary measures with him.