53 Cal.App.5th 266
Cal. Ct. App.2020Background
- Coinbase is a custodial cryptocurrency exchange; Archer held an account with 350 Bitcoin as of Oct. 23, 2017.
- A third party created a Bitcoin fork called Bitcoin Gold on that date, assigning forked units to existing Bitcoin holders on the new chain.
- Coinbase evaluated Bitcoin Gold and publicly announced it would not "support" the fork due to security concerns after monitoring the network.
- Archer sued Coinbase for breach of contract, conversion, and negligence, alleging Coinbase refused to give him access to his Bitcoin Gold.
- The trial court granted summary judgment for Coinbase: the User Agreement did not obligate Coinbase to support third‑party forks; conversion requires an affirmative act; and negligence was barred because no independent tort duty existed beyond the contract.
- The Court of Appeal affirmed, holding Archer failed to raise triable issues of material fact that Coinbase contracted to deliver or affirmatively exercised dominion over the forked coins or owed an independent duty of care.
Issues
| Issue | Plaintiff's Argument | Defendant's Argument | Held |
|---|---|---|---|
| Breach of contract | Archer says Coinbase held itself out as a crypto exchange obliged to provide "usual and customary" services, including honoring forks, so it breached by not providing Bitcoin Gold. | Coinbase points to the signed User Agreement (integration clause) which contains no obligation to support third‑party currencies or forks; no oral/written promise exists. | No breach: no contractual duty to support Bitcoin Gold; parol evidence barred by integration clause; no triable issue. |
| Conversion | Archer contends Coinbase’s retention/inaction deprived him of property (Bitcoin Gold). | Coinbase argues conversion requires an affirmative act exercising dominion; it took no such action and the forked coins exist on the public network. | No conversion: undisputed evidence shows Coinbase did not affirmatively deprive Archer or exercise ownership. |
| Negligence | Archer asserts Coinbase negligently failed to provide services (including for forks) causing loss. | Coinbase says no independent tort duty exists beyond contractual obligations; negligence cannot rest on breached contractual duties alone. | No negligence: no independent legal duty alleged or shown; economic‑loss/contract principles apply. |
Key Cases Cited
- Sonic Manufacturing Technologies, Inc. v. AAE Systems, Inc., 196 Cal.App.4th 456 (elements of breach of contract require showing contract and specific breached term)
- Levy v. State Farm Mutual Automobile Ins. Co., 150 Cal.App.4th 1 (breach claim must identify contractual provision alleged to be breached)
- Spates v. Dameron Hospital Assn., 114 Cal.App.4th 208 (conversion requires affirmative act to exercise dominion over property)
- McKell v. Washington Mutual, Inc., 142 Cal.App.4th 1457 (elements of conversion and damages)
- Aas v. Superior Court, 24 Cal.4th 627 (tort recovery ordinarily not available for duties that merely restate contractual obligations)
- Erlich v. Menezes, 21 Cal.4th 543 (breach of contract is tortious only when an independent tort duty exists)
- Masterson v. Sine, 68 Cal.2d 222 (integration bars use of parol evidence to add terms to a written agreement)