There are a lot of myths and misconceptions surrounding estate planning. Many people think that a last will and testament is the only estate planning document you really need. This of course is false. Others assume that you only need to have an estate plan in place if you're a millionaire. This too is false. Another popular myth in the world of estate planning is that the best way to disinherit a relative (particularly a child) is to leave him or her a single dollar in your will. You probably guessed it- this too is entirely false. 

The truth of the matter is that you must be very careful with leaving someone you really want to disinherit a token gift of $1 or some other small amount. By doing so, you have now made that person a beneficiary of your estate. It is possible, if not likely, that state law will require your executor to provide all beneficiaries with copies of all pleadings, an accounting, and notice of various administration activities. This may make it easier for this "beneficiary" to now complain about things and may cause problems for your executor which could cost your estate money. 

Instead of leaving a token amount, you might consider mentioning the person by name so it is clear that you have not simply overlooked them. Then, you would specifically state you are intentionally disinheriting them from your estate. Also, consider if you wish to disinherit that person's children or more remote descendants and if so specifically state that as well in your will. You should consult with an estate planning lawyer to assist you in the proper wording as you will want to make sure there is as little likelihood of a will contest as possible.