Is it possible to get a certificate stating that I don’t know where my husband is registered and where he is?

Please tell me, this situation has arisen, I left for Germany and want to apply for social assistance there, my husband and I divorced, and he does not have registration in Ukraine, he left the hostel 20 years ago and after that he did not register anywhere, I don’t want apply for alimony, where can I get a certificate stating that I don’t know where my husband is registered and where he is now