A recent decision from the Delaware Court of Chancery is a gem of a pithy ruling that is chock-full of practical principles. The elements of a claim for fraud, which is the same in Delaware as fraudulent inducement, may be basic, but this letter ruling provides a useful restatement of the law.
In iSense, LLC v. Biomerieux, Inc., et al., C.A. No. 2023-1221-SKR (Del. Ch. Dec. 4, 2025), the court also features the somewhat unusual requirements for a successful motion to strike under Rule 12(f), which permits a party to strike a pleading for several reasons, including the one employed here, for “any insufficient defense.” The court referred to several other related lawsuits in Delaware involving a dispute over the licensing and sub-licensing of certain medical patents.
This short blog post will only highlight the noteworthy basic and esoteric rules and substantive law that have widespread application for corporate and commercial litigators.
Highlights
- Court of Chancery Rule 12(f) allows a party to move to strike from a pleading “any insufficient defense.” Though not applicable here, it also allows a party to move to strike any material that is “redundant, scandalous, immaterial, or not pertinent.”
- The court explained that such motions are “granted sparingly and only when clearly warranted with all doubt being resolved in the non-moving parties’ favor.” Slip op. at 6.
- The court instructed that a motion to strike “reaches formal defects only” and will be denied “if the defense is sufficient under law.” Id. (footnotes omitted).
- The affirmative defense at issue was a rejoinder to a breach of contract claim and the argument was that fraudulent inducement was a defense to the enforcement of the contract if it existed.
- The court recognized fraudulent inducement as an appropriate affirmative defense to a breach of contract, but the court concluded that the defendant failed to allege the required element of reliance. Id.
- The court recited the five necessary elements for a fraud claim, which in Delaware are the same as for fraudulent inducement. Id. at 7.
- Court of Chancery Rule 9(b) provides the fraud must be pled with particularity including when it is raised as an affirmative defense, although “conditions of a person’s mind may be alleged generally.” Id. at 7. (footnotes omitted).
- The reliance required for establishing fraud as a claim or an affirmative defense requires a party to “allege—at minimum—particularized actual allegations from which the court may reasonably infer reasonable reliance. The court and plaintiff “should be able to understand how the alleged fraud caused this injury.” Id. at 8. (footnotes and internal quotations omitted).
- Even though the issue of reliance is generally not suitable for a motion to dismiss based on the fact intensive inquiry needed, the court found that reliance was not alleged in the affirmative defense, even in a conclusory fashion, which prevented the court from reasonably inferring a basis for reliance. Id. at 9.
- As a procedural practice tip, the court refused to accept an explanation about reliance at oral argument because it was not included in the actual pleadings. Id. at 10 and footnote 43.
- In closing, the court the court hinted at the possibility that the defendant might seek leave to amend his affirmative defenses.
Postscript: The author of this decision was Superior Court Judge Sheldon K. Rennie, who was sitting by designation as a Vice Chancellor.