Wills and Trusts:
Trusts are usually easier to amend than wills, though you should get the change notarized if it involves real estate. Changes through trusts are called amendments. You can amend your trust if you want to change or add beneficiaries, change trustees or change the disposition of assets. An amendment to the trust is a writing that explains the changes, specifying new additions or deletions, which is then signed and dated.
It is advisable to review your trust with your estate planning attorney every three to five years in order to make sure it stays up to date.