A transfer on death deed is revocable even if the transfer on death deed or another instrument contains a contrary provision.
Del. Code tit. 25, § 206
Transfer on death deed revocable
Known as the Uniform Real Property Transfer on Death Act
The act spans §§ 25–25 (21 sections).
85 Del
Official source: Delaware Code Online. Reproduced from public-domain Delaware statutes; confirm against the official source for the current text. Not legal advice.