Determine the address of the court where the will is in probate, usually the probate court in the county in which the testator died. Alternatively, try the probate court in the county the testator resided before death. In some jurisdictions, like Los Angeles, a special probate court phone number provides case information over the telephone. As a last resort, ask next of kin where the will is filed.
Take the death certificate -- a public record available from vital statistics in the jurisdiction -- to the jurisdictional courthouse or, if you don't have the certificate, you will need the full name of the deceased and his date and place of death. In many jurisdictions, the general clerk's office files all legal documents including probate documents. Ask the clerk to pull the probate file. Generally, you review the file in a nearby location with a clerk observing, but different jurisdictions impose different restrictions. A probate file is an official court record; do not mark documents or take the file from the courthouse.
Look through the probate file for the last will and testament; it is likely one of the early documents. Review it in the courthouse or obtain a copy from the court clerk and read the will at home. Heirs are generally not listed separately, so search the entire bequest section for your name or words referencing you (for example,"my sister Sophie's only daughter.")
Obtain the name and phone number of the executor from the will or probate file. An executor files the will in probate, collects assets, pays the testator's outstanding bills and distributes the remainder of the estate according to the terms of the will. The testator names the executor in the will and her name is listed in most probate documents. Call the executor and ask questions to confirm whether the testator left you a devise in the will.