It's impossible for any living person, disincarnated Soul or anything to negate your 'free will' by imposing their will on you without your consent.
You would have to accept and believe that someone could "curse" you; and they "curse" you by saying you are going to have hardship with money (for example). Then YOU would have to keep making negative choices with your money and start having money problems, like a self-fulfilling prophecy.
People can believe they have a curse or spell on them that's "making them" make bad choices or that they have no control over that aspect of their life when there is literally nothing there (no one is directing anything negative at them). They become very upset and continue, by choice, to take no responsibility for what they are actually creating over and over. That is conscious choice to do this, not some mystical spell or curse on you.
That means there is NO such thing as spells, curses, directing negative thoughts at you that can harm you, or any spirit or "entity" energetically trying to feed off of you, etc. The Divine chose for every Soul to be self-directed and in charge at all times of the life we create by using our gift of 'free will' without negative interference.
We are always highly protected and helped by "the Divine", our Spirit Guides, Angels, and our departed loved ones. Even our highly competent Spirit Guides do not force us do anything because they cannot negate our free will, nor do they want to. So how could some bitter, self-involved person override our gift of free will with a curse or spell? They cannot.
BEWARE of any psychic, medium or healer that you are paying, or attending a group or class of theirs who fraudulently tells you that says:
All these things listed above are all nonsense and unethical. They are hermetic, archaic negative beliefs. We live in 2018, not 1687. Embrace your ability to powerfully and authentically create your life with your gift of free will unencumbered.
A psychic or medium who does any of the things listed above is doing this is trying to get your money, they are fear-based in their thinking, or because it makes them feel powerful. They prey on the mentally fragile, grieving and unaware clients so don't buy it. I have dealt with many clients that I had to explain what was really going on after they went to a psychic that operates like this and tell them the truth.
You alone are in charge of your free will. You can't negate someone else's free will just because you want them back (and vise versa).
Some people unknowingly drain you energetically who are "psychic vampires" (someone who drains other people for their positive energy instead of getting it from Divine Source). A psychic vampire is that friend, family member, co-worker that you feel exhausted after talking to them for 30 minutes. All you have to do is say to your Spirit Guides or think is, "I don't allow you to interfere with my free will. You cannot be in my energetic space trying to drain me." It will stop, your gift of free will demands this. Consciously in your mind give back to them their anxiety, depression, anger, etc., and then tell yourself confidently that you're okay and strong.
People who honestly believe they are under "Demonic Possession" or under 'demonic' attack, alien influence, being taken over by some force, etc., are in reality mentally ill and not understanding what's happening to them. Or they're being told that there are these things happening to them so don't believe it! They should get away completely from the negative person saying these things, and seek professional Counseling if needed.
Can you get a bothersome or "teenage troublemaker" departed Soul playfully doing stuff around you? Yes. In reality it's not common, simply tell them to get out of your space and don't come back. They have to leave because it's your energetic space governed by your gift of free will. That means you are in charge of the energy in your home. If it makes you feel more empowered to also smudge your house with white sage or whatever feels right then do so.
Sometimes a person may not be aware that they are sensitive to spirits and departed Souls so when they sense something it scares them so they start believing it's "bad" or negative when it's not.
I have seen a people with good intentions who know they are sensitive to sensing spirits and departed Souls say they see something negative because it "looks dark" or "has a dark face," and simply because it is not clear to them they jump to the wrong conclusion that it is evil, scary or negative. They believe if they ask who it is, or try to communicate with it they will accidentally "invite it to stay" or will be bothered by it. Those are hollywood horror movie beliefs, not real life. This is a common misconception in the Spiritual Development community.
The point to remember is that 'The Divine' chose for every Soul to be self-directed and in charge at all times of the life we create by using our gift of 'free will' without interference. Nothing can negate that.
You have 100% accountability and responsibility for your life, your thoughts and all the choices you make. You alone create your life through the choices and actions you take using your ability of 'free will.' It's the Universal Law of 'Divine Will' (free will) from the Divine that demands this.
I understand that many people don't know, understand or accept these facts about our 'free will' as Truth, and that's their choice. Yet they are making a disempowered or fear-based decision by choice (as is aligned with the concept of free will to make our own choices - no judgment).
Be open-minded, sensible and trust your gut when getting involved with any new person, church, religion, and Spiritual or New Age organization or community.
If you get a good vibe from someone and they feel sincere then let that be your guide. If that changes then walk away, no explanations are needed. You decide who you believe, and what you believe. Like all religions, individual Spiritual practitioners, Shamans, gurus, psychic mediums, and healers there are dishonest and manipulative people. I'm Spiritual, and I respect all religions and spiritual practices in the world that are practiced with good intentions and honesty, based on love and caring for all others.
Honor and utilize your gift of free will every day and in every decision and action you take. Come from a place of empowerment, freedom and abundance when you make choices; not fear, worry, stress or helplessness.