The courts may agree to modify the terms of an irrevocable trust if the settlor can demonstrate that circumstances have sufficiently changed. Can an Irrevocable Trust Be Amended?Irrevocable trusts are usually unchangeable, but there are 5 legal ways to modify one. Read our blog and know how to do an irrevocable trust modification in Florida? For more information, contact us at 561-656-0200. Similar rules are applied to both mortgages and deeds of trust. 4. Construction or in the foreseeable future are prohibited. 2d 742 (1938" permitting revocation under. Section 2280 despite the procedure in the trust, the court in Hibernia. (With Future Advance Clause).