The highly rated goalkeeper is one step closer to completing his move to the Serie A side as both clubs have reached an agreement over a transfer fee
Rafael's agent had already revealed they were close to agreeing personal terms with the Partenopei and it now appears to be a matter of time before the transfer is completed following the latest developments.
"We received a draft contract from Napoli the other day and their offer matches all of Santos' demands. We should be able to wrap things up shortly," Santos vice-president Odilio Rodrigues told Fox Sports.
Santos own 70 per cent of the shot stopper's registration, with Teisa own 15% and the player himself owning the remaining 15%.
Napoli are keen to add a new goalkeeper to their squad to fight it out with Morgan De Sanctis for the No.1 position and they see the 23-year-old Rafael as the ideal signing.
Rafael had previously attracted the interest of Roma, but he now seems destined to continue his career at Rafa Benitez's new side.
PSV's Dries Mertens has already joined the Naples outfit.