go to ellisisland,org website and locate his entry and locate the town of origin and then go to www.paginebianche.it for correct spelling use both spellings. Insert surname(s) in first line and town in third line and click CERCA. If there are others in the town with same last name then they will show up with either spelling and you will know which is correct. Peter.
I took the liberty to check out the ellis island website and there is no Raffaele Palotti but there is a Raffaele Pallotti froim Melfi which is in a town in the province of Potenza in the Basilicata region which adjoins the campania region where amalfi is located. There are several Palotti persons but none are named Raffaele and consequently are not related to you. It would be a safe assumption that the name at time of entry was spelled correctly but that after entry into the USA the name was inadvertently changed so immigration authoirities are spared this time! There are no Pallotti in Melfi but you can request documents kfrom there if you wish. Peter