American Express provides the following conditions for disputing transactions.  The dispute conditions are categorized as shown.  Recovery options may be automatically selected and executed by the system, when enabled.  In some cases, primarily fraud and authorization disputes, recovery options are set based on a number of validations to determine if chargeback rights exists.  Any applicable validation rules are documented in each recovery option.  In other cases, such as cardholder disputes or processing errors, the system will select a particular recovery option based on certain claim attributes.  These defaults for American Express recovery options are defined in 

Retrieval

Request for Support Not Fulfilled (4516)

Request for Support Illegible/Incomplete (4517)

Authorization

Invalid Authorization (4521)

Cardmember Disputes

Credit Not Presented (4513)

Paid Through Other Means (4515)

Cancellation of Recurring Goods/Services (4544)

Not as Described or Defective Merchandise (4553)

Goods and Services Not Received (4554)

Car Rental Charge Non-Qualified or Unsubstantiated (4750)

Local Regulatory/Legal Dispute (4754)

Fraud

Missing Imprint (4527)

Multiple ROCs (4534)

Card Not Present (4540)

No Valid Authorization (4755)

Fraud Full Recourse (4763)

Fraud Liability Shift - Counterfeit (4798)

Fraud Liability Shift - Lost/Stolen/Non-Received (4799)

Processing Error

Incorrect Transaction Amount or Primary Account Number (PAN) Presented (4507) 

Multiple Processing (4512)

Unassigned Cardmember Account Number (4523)

Currency Discrepancy (4530)

Late Presentment (4536)

Credit/Debit Presentment Error (4752)