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AI Generated Exam Case

Case - Stolen E-Bike

Facts

Sam (S) is a known bicycle thief. One night, he steals a nearly new, expensive e-bike belonging to Olivia (O) from outside a restaurant in Munich.

A few days later, S places a classified ad on an online platform offering the e-bike for EUR 800. Ben (B), a 16-year-old high school student, sees the ad. The price is very attractive but not so low as to raise immediate suspicion of theft. B contacts S and they meet in a public park. S acts entirely normal and claims he is selling his own bike because he is moving abroad. B genuinely believes S is the legitimate owner.

B hands over EUR 800 in cash, which he had saved up from his birthday money over the last three years. S hands over the e-bike to B. B rides home happily. B’s parents do not know about this purchase, and when they find out the next day, they strongly object to it, arguing that EUR 800 is far too much money for B to spend without their permission. They tell B to return the bike and get his money back.

One week later, while B is riding the e-bike in the city, Olivia (O) spots him. She recognizes the e-bike immediately due to a custom scratch on the frame and the frame’s serial number. O confronts B, proves that the bike is hers with her original purchase receipt, and demands that B hands the bike over to her immediately. B is shocked but complies.

Now without the bike and without his money, B manages to track down S’s real identity and address through the online platform. B (supported by his parents) demands his EUR 800 back from S.

Questions:
a. Did B become the legal owner of the e-bike when he bought it from S? (7 P)
b. Is the sales contract between S and B legally valid? (8 P)
c. What is the legal basis for B to demand the EUR 800 back from S? (10 P)

Solution

Solution Summary

Part a: Ownership of the E-Bike

• Issue: Did B acquire ownership from a non-owner in good faith?
• Rule: Under § 929 BGB, ownership transfers by agreement and handover. If the seller is not the owner, the buyer can acquire ownership in good faith (§ 932 BGB). However, good faith acquisition is excluded if the item was stolen (§ 935 BGB).
• Application: S was not the owner (he stole it). B acquired possession and was in good faith, believing S was the owner. But since the bike was stolen from O, § 935 I BGB applies.
• Conclusion: No, B did not become the owner. O remained the owner.

Part b: Validity of the Sales Contract

• Issue: Is the contract valid considering the stolen nature of the bike and B’s age?
• Rule:
  • The sale of stolen goods does not make the underlying sales contract void (Principle of Abstraction).
  • However, B is a minor (16 years old) with limited legal capacity (§ 106 BGB).
  • A contract not merely legally advantageous requires parental consent (§ 107 BGB). Without prior consent, it is pendingly invalid (§ 108 BGB).
  • Exception: Pocket money rule (§ 110 BGB).
• Application: The contract requires B to pay EUR 800, which is legally disadvantageous. He acted without prior consent. The EUR 800 came from saved birthday money, but a single purchase of EUR 800 by a 16-year-old generally exceeds the scope of the “pocket money” rule, especially against the parents’ explicit subsequent objection. The parents explicitly refused consent (ratification).
• Conclusion: No, the sales contract is definitively void (§ 108 I BGB).

Part c: Claim for Restitution of EUR 800

• Issue: On what legal basis can B reclaim the money?
• Rule: Unjustified Enrichment (§ 812 I 1 Alt. 1 BGB). A person who obtains something by performance of another without legal ground is bound to give it up.
• Application:
  • S obtained ownership and possession of the EUR 800 cash.
  • This was done by performance of B (to fulfill the assumed contract).
  • Since the sales contract is void due to minority (§ 108 I BGB), there is no legal ground (sine causa) for S to keep the money.
• Conclusion: B can demand the EUR 800 back under § 812 I 1 Alt. 1 BGB. (Note: claims under tort, e.g., § 823 II BGB i.c.w. § 263 StGB for fraud, could also apply).

Advanced Legal Analysis

Topic 1: Defect in Title (Rechtsmangel)

• What if B had been an adult (18 years old) and the contract was valid? In that case, B could not use unjustified enrichment because the contract would be a valid legal ground. Instead, B would rely on Sales Law (§ 437 BGB).
• O’s ownership constitutes a defect in title (Rechtsmangel) under § 435 BGB, as a third party can assert rights against the buyer. Since S cannot procure ownership of the stolen bike (cure is impossible, § 275 I BGB), B could revoke the contract immediately under § 326 V BGB and demand his money back under § 346 I BGB. The abstraction principle means the sales contract remains valid even if performance is impossible or defective.

Topic 2: Property Transfer of the Cash

• While B did not acquire ownership of the bike, did S acquire ownership of the EUR 800 cash? Under German property law (§ 929 BGB), the transfer of ownership of money requires agreement and handover. A minor needs parental consent for property transfers if they are legally disadvantageous. However, transferring one’s own money is legally disadvantageous, so the property transfer of the money is technically also pendingly invalid. But since cash is fungible, if it mixes with S’s other money, S acquires ownership by commingling (§ 948 BGB). Regardless of the property aspect, the enrichment claim (§ 812 BGB) targets the value.

Write-Up

Question a: Ownership of the E-Bike

Issue: Did B acquire legal ownership of the e-bike despite it being stolen?

Rule: Under German property law, the transfer of ownership of movable goods requires an agreement and handover between the owner and the acquirer (§ 929 S. 1 BGB). If the transferor is not the true owner, the acquirer can still become the owner if they act in good faith (§ 932 BGB). Good faith means the acquirer does not know, and is not grossly negligent in not knowing, that the item does not belong to the transferor.
However, this good faith acquisition is strictly excluded by § 935 I BGB if the item was stolen from the owner, went missing, or was otherwise lost.

Application: S was not the owner of the e-bike; O was. Therefore, a direct transfer under § 929 BGB failed. B met the requirements for good faith acquisition under § 932 BGB because he genuinely believed S was the owner and the circumstances (a normal meeting, plausible story) did not make this grossly negligent. However, since S had stolen the e-bike from O, the bike qualifies as stolen property. Under the strict rule of § 935 I BGB, stolen property can never be acquired in good faith, protecting the original owner over commercial traffic.

Conclusion: No, B did not become the legal owner of the e-bike. O remained the owner.

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Question b: Validity of the Sales Contract

Issue: Is the sales contract valid, considering the stolen bike and B’s age?

Rule:
Firstly, under the Abstraction Principle (Trennungsprinzip), the validity of the underlying obligatory contract (the sales agreement) is independent of the validity of the property transfer or the seller’s ability to fulfill the contract. Selling stolen goods does not render the contract void.
Secondly, B is 16 years old and therefore a minor with limited legal capacity (§ 106 BGB). Under § 107 BGB, a minor requires the consent of their legal representatives (parents) for declarations of intent that are not merely legally advantageous. A sales contract imposing a payment obligation is not merely advantageous. Without prior consent, the contract is pendingly invalid (§ 108 I BGB) and depends on the parents’ ratification. An exception is the “pocket money rule” (§ 110 BGB), which makes a contract valid if the minor fulfills their obligation with means provided to them for that purpose or for free disposal.

Application:
The fact that the bike is stolen does not invalidate the contract itself. However, B lacked the capacity to independently conclude a contract for EUR 800. The contract required him to pay, creating a legal disadvantage. He had no prior consent from his parents. While he used his saved birthday money, EUR 800 is a substantial amount that typically exceeds the bounds of what parents impliedly consent to under the pocket money rule (§ 110 BGB), especially for a single transaction of a motor-assisted vehicle. Therefore, § 110 BGB does not save the contract. The contract was pendingly invalid. Since the parents explicitly objected and demanded the money back, they refused ratification (§ 108 I BGB).

Conclusion: No, the sales contract is definitively void due to the lack of parental consent.

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Question c: Claim for Restitution of EUR 800

Issue: On what legal basis can B reclaim the EUR 800 from S?

Rule: When an obligatory contract is void, any performances made under the assumption of that contract must be reversed using the law of Unjustified Enrichment (Ungerechtfertigte Bereicherung). The primary claim is § 812 I 1 Alt. 1 BGB (performance condiction). It requires that a person (1) obtains something (an enrichment), (2) by performance of another, and (3) without legal ground (sine causa).

Application:

1. S obtained possession and (by commingling) ownership of the EUR 800 cash notes. This constitutes an enrichment.
2. S obtained this money through the conscious and purposive augmentation of his assets by B, who intended to fulfill the sales contract. This constitutes a performance.
3. As established in question b, the sales contract is definitively void due to B’s minority (§ 108 I BGB). Therefore, there is no valid legal ground justifying S’s retention of the money.

Conclusion: B can demand the restitution of the EUR 800 from S based on Unjustified Enrichment under § 812 I 1 Alt. 1 BGB.