Deny Salvation by Grace, by the shed blood of Jesus on the Cross at Calvary and by true repentance of sin by a sinner. Usually will not see a cross on the cult's structures. Salvation must be by works, and quite often by a system dictated by the cult. The Holy Spirit is changed into a 'good force' or impersonal entity. Deny God the Spirit.
Spiritism is, generally, rampant by having visits from spirits, counterfeit miracles, etc.
Founded by man, followed by others, who claim to be God's one true spokesman on Earth. Accountable to no one but God. Gives revelation and scripture. Their group is the only true way to perfection. The word 'truth' used over and over.