Moshiri claimed at the Toffees’ general meeting on Tuesday night that Lukaku left Goodison in the summer after his mother, Adolphine, encouraged him to follow a voodoo message to rejoin Chelsea.
The Belgium striker had refused to sign a contract extension with Everton and later signed for Manchester United in a deal worth up to £90m.
But Lukaku has rubbished the claim made by Moshiri and is seeking legal advice over the matter.
A spokesperson for the player said: “Romelu’s decision had nothing to do with voodoo.
“He distances himself from these beliefs and this statement and will now see what judicial steps can be taken in relation to them.
“Romelu is very catholic and voodoo is not part of his life or his beliefs.