Anne Heche’s Son Homer Claims Actress’s Signature on Will Presented by Ex James Tupper Is Invalid

Anne Heche’s will — or lack thereof — continues to cause tension between theloved ones she left behind.

Per court documents obtained by PEOPLE, Heche’s older son Homer Laffoon (whomshe shared with ex-husband Coleman Laffoon) has filed a nine-page supplementto his previous petition to assume control over his mother’s estate.

The 20-year-old claims that his mother’s ex James Tupper, 57, has beeninterfering with Homer’s attempts to communicate with his 13-year-old oldhalf-brother Atlas Heche Tupper since Heche’s death in August.

Homer also claims in the filing that a 2011 document Tupper considers a will —and which he asserts named him administrator of Heche’s estate — is not validbecause the signature on the document does not belong to Heche and was notobserved by two witnesses as required by law.

Legal representative for both Homer and Tupper did not immediately returnPEOPLE’s request for comment.

James Tupper, HomerLafoon

James Tupper, Homer Lafoon

JC Olivera/Getty; Anne Heche/Instagram

Per Tuesday’s filing: “Mr. Tupper repeatedly refers to the email attached tothe Objection as a ‘will.’ However — as a matter of law — the email does notqualify as either a holographic will or formal witnessed will,” the documentreads. “The email fails to satisfy the legal requirements for a validholographic will because the material provisions of the purported will are notin the handwriting of the Decedent. A will is valid as a holographic will,whether or not it is witnessed, if the signature and the material provisionsare in the handwriting of the testator.”

The filing continues, “The email presented to the Court as Decedent’s ‘will’by Mr. Tupper fails to meet the requirements for a valid holographic willbecause the signature and material provisions are not in the handwriting ofthe Decedent. The email fails to satisfy the legal requirements for a validformal witnessed will because the email was not signed by the Decedent anddoes not have two witnesses who signed the document during the lifetime of theDecedent.”

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The document also points out that without a proper will, “there can be nonomination of an executor” or an executor selected, in general. This role isimportant as the executor “is appointed to administer an estate pursuant to avalid will,” according to the legal papers.

RELATED: Anne Heche ‘s Ex James Tupper and Son Homer Laffoon Vie forControl of Her Estate in Court

Christian Siriano Celebrates the launch of new book 'Dresses to DreamAbout'ChristianSiriano Celebrates the launch of new book 'Dresses to DreamAbout'

Christian Siriano Celebrates the launch of new book ‘Dresses to Dream About’

Rachel Murray/Getty

Homer also called several of Tupper’s own previously filed objections to the20-year-old’s “suitability” to administer his mother’s estate — includingclaims Homer was “‘estranged’ from his mother at the time of her death” —”inaccurate and unfounded. “

RELATED: Anne Heche ‘s Son Homer Files Papers to Assume Control of HerEstate as It’s Revealed Actress Had No Will

BEVERLY HILLS, CALIFORNIA - MARCH 12: Anne Heche attends the 74th AnnualDirectors Guild of America Awards at The Beverly Hilton on March 12, 2022 inBeverly Hills, California.  (Photo by Axelle/Bauer-Griffin/FilmMagic)BEVERLYHILLS, CALIFORNIA - MARCH 12: Anne Heche attends the 74th Annual DirectorsGuild of America Awards at The Beverly Hilton on March 12, 2022 in BeverlyHills, California.  (Photo by Axelle/Bauer-Griffin/FilmMagic)

BEVERLY HILLS, CALIFORNIA – MARCH 12: Anne Heche attends the 74th AnnualDirectors Guild of America Awards at The Beverly Hilton on March 12, 2022 inBeverly Hills, California. (Photo by Axelle/Bauer-Griffin/FilmMagic)

Axelle/Bauer-Griffin/FilmMagic Anne Heche

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Heche was involved in a fiery car accident on Aug. 5 and then was transportedto a Los Angeles-area hospital. The actress sustained several injuries fromthe incident, and PEOPLE confirmed two days later that she was in a coma andhad “not regained consciousness” since the crash.

The state of California declared Heche legally dead on Aug. 12, but shetemporarily remained on life support to allow for her organs to be removed anddonated. On Aug. 14, her rep confirmed to PEOPLE she had been taken off oflife support.

She is buried at the Hollywood Forever Cemetery in Los Angeles.