The rule of thumb is only the original copy of a will is valid. The original is what must be filed with the court. Most people make copies of their will though. A copy of a will may be admissible in court if the original has been destroyed by a fire or flood or if the original has been unintentionally lost by the testator. If the original will was purposely destroyed or thrown out by the testator because he or she wanted to revoke that will, the copy is not valid. A certified copy is useful for filing other legal papers (such as to transfer title of assets). Locating a will can take some digging, but with diligence and careful research you should be able to obtain a copy of the will you are looking for.