Knowing what you are getting yourself into with spells

I'm not going to name names, but I was contacted by a friend who has been hurt by love with the appearance of a third party who showed up to cause trouble. Now my friend looked into getting a "Witch" to do a couple of spells for them, the "Witch" has charges quite the fee it appears, but the friend doesn't know exactly what type spells are being used so not 100% sure of the outcome & what it would mean for them in the long run. To me this sounds incredibly suspect/dangerous, seriously when delving into the realms of spellcasting there are some rules I would seriously consider following.

• You don't have to be a Witch to cast a spell, it tends to work better if the person who needs/wants the spell to do it as it is more likely to have an effect as you are actually involved & not a third party who may have missed a detail in your case & who may have their own agenda, which could just be a make money fast scheme. If the spell fails or goes wrong they probly won't claim responsibilty for it.
• Be clear about exactly what it is you want & what you want the outcome to be. 
• Be able to deal with the consequences if it doesn't turn out how you exactly planned it.
• Make sure in the right state of mind when you do things, when passions are high you could end up biting off more than you can chew with what you are sending out there. Be level headed about these things.
• Think it through first, is there something you can do on a physical level before hitting the spell books?

I do hope my friend will be OK for their own sake & that things turn out to how they wanted to & not something completely distorted or unwelcome.