I need a document

Sofi5117

I need the document Microfilme # 005358170 legalized original. It is for my Italian citizenship

Áine Ní Donnghaile

FamilySearch does not offer that service. You will need to contact the commune where your ancestor originated. See https://italiancitizenshipassistance.com/how-to-retrieve-the-documents-required-for-italian-citizenship-by-descent/
You may want to post in the Italy Research group where experienced Italian researchers may be able to assist you.