In simple terms: A severe one-time liability shock could be survivable if the traveler's-cheque and charge-card franchise remained intact. American Express and the salad-oil scandal is included in the Buffett Partnership special-situations record with an evidence grade of B - later Buffett/public historical evidence; not named in the contemporaneous letters.

What Buffett saw

The salad-oil fraud created claims large enough for investors to fear a permanent balance-sheet impairment. Buffett's question was different: whether customers and merchants still trusted the traveler's-cheque and charge-card franchise.

That is why the case is more demanding than a merger spread. There was no fixed payout or closing date. Buffett had to decide whether a frightening, measurable liability was a one-time loss, while the market was incorrectly treating it as the destruction of a much more valuable customer franchise.

How the situation was meant to work

The thesis could work only if people continued to use American Express. If the franchise's habits, distribution and trust survived, future earnings power could outweigh the scandal cost. The later disclosure of a roughly 40% allocation shows how strongly Buffett believed the distinction mattered.

Later Buffett disclosures identify a roughly $13 million position, more than 5% of American Express and about 40% of BPL capital. The contemporaneous Partnership letters discuss major positions anonymously, so the later identification must remain separate from the letter record.

The timeline, capital and risk

Capital disclosed: Later Buffett disclosure: about $13 million, about 40% of BPL capital, for more than 5% of American Express.

Time frame: Chiefly 1964-1967.

A crisis position has no contractual floor like a cash merger. If customer behaviour had changed, the liability could have been only the first problem. It is also essential to separate later Buffett recollections from the anonymous contemporaneous Partnership letters.

What happened

Outcome: The franchise survived; later reporting describes a large gain and eventual sale.

What the return means - and the lasting lesson

Return record: Later reporting says roughly $20 million profit after about two years; the BPL letters do not give a precise case return.

This is an event-driven franchise investment, not a contractual-payout work-out. Without a merger price or liquidation timetable, the core work is assessing whether the business's earning power survived the shock.

This guide is educational information, not a recommendation, investment advice or a substitute for reading the underlying disclosure.