In order for your will and other estate planning documents to be useful, it is important they get into the hands of your executor.
Many people believe that a safe and secure place for their estate plan is in a safety deposit box at a bank. However, it turns out that isn’t true, according to Noozhawk in "12 Things to Keep in a Safe at a Home, Not at a Bank."
If no one knows where your will is and can’t locate it, then it cannot be used by the courts.
It is, therefore, important to make sure your will can be found and accessed quickly by those who need it after you pass away. Many people believe that a good storage place is a safety box.
The biggest drawback to safety deposit boxes is that they are secure because access to them is extremely restricted. The bank is not going to let someone show up and access your box, even if that person has your key and your death certificate.
Access normally requires a court order, which can be time-consuming to get. Courts are often reluctant to give them to anyone other than the executor of the estate. However, without seeing the will, it would not be known who the executor of your estate is supposed to be.
An estate planning attorney can advise you on creating an estate plan that meets your unique circumstances and keep a copy on file.
You can take a copy home and put it in a secure place. Your estate planning attorney can also keep a copy on file.
Reference: Noozhawk (April 23, 2017) "12 Things to Keep in a Safe at a Home, Not at a Bank."