# Error messages and codes Error messages and codes for the Advanced Commerce API. ## Topics ### Error codes [`object ACAPriceIncreaseIsNotCurrentlySupportedInIndiaError`](/documentation/AdvancedCommerceAPI/ACAPriceIncreaseIsNotCurrentlySupportedInIndiaError) [`object AlreadyRefundedError`](/documentation/AdvancedCommerceAPI/AlreadyRefundedError) [`object AtLeastOneItemError`](/documentation/AdvancedCommerceAPI/AtLeastOneItemError) [`object AtLeastOneOfDisplayNameOrDescriptionError`](/documentation/AdvancedCommerceAPI/AtLeastOneOfDisplayNameOrDescriptionError) [`object BillingCycleResetWithEffectiveLaterError`](/documentation/AdvancedCommerceAPI/BillingCycleResetWithEffectiveLaterError) [`object ChangeItemNotFoundError`](/documentation/AdvancedCommerceAPI/ChangeItemNotFoundError) [`object CurrentSKULengthExceededError`](/documentation/AdvancedCommerceAPI/CurrentSKULengthExceededError) [`object DependentSKUsCannotBeChainedError`](/documentation/AdvancedCommerceAPI/DependentSKUsCannotBeChainedError) [`object DependentSKUsCannotBeSharedError`](/documentation/AdvancedCommerceAPI/DependentSKUsCannotBeSharedError) [`object DescriptionLengthExceededError`](/documentation/AdvancedCommerceAPI/DescriptionLengthExceededError) [`object DisplayNameLengthExceededError`](/documentation/AdvancedCommerceAPI/DisplayNameLengthExceededError) [`object EmptyAddChangeItemsError`](/documentation/AdvancedCommerceAPI/EmptyAddChangeItemsError) [`object FreeTrialOfferMustUsePeriodCountOfOneError`](/documentation/AdvancedCommerceAPI/FreeTrialOfferMustUsePeriodCountOfOneError) [`object GeneralInternalError`](/documentation/AdvancedCommerceAPI/GeneralInternalError) [`object GeneralInternalRetryableError`](/documentation/AdvancedCommerceAPI/GeneralInternalRetryableError) [`object InactiveACASubError`](/documentation/AdvancedCommerceAPI/InactiveACASubError) [`object InsufficientFundsError`](/documentation/AdvancedCommerceAPI/InsufficientFundsError) [`object InvalidAmountError`](/documentation/AdvancedCommerceAPI/InvalidAmountError) [`object InvalidAppAccountTokenError`](/documentation/AdvancedCommerceAPI/InvalidAppAccountTokenError) [`object InvalidChangeReasonError`](/documentation/AdvancedCommerceAPI/InvalidChangeReasonError) [`object InvalidConsistencyTokenError`](/documentation/AdvancedCommerceAPI/InvalidConsistencyTokenError) [`object InvalidCurrencyError`](/documentation/AdvancedCommerceAPI/InvalidCurrencyError) [`object InvalidDescriptionError`](/documentation/AdvancedCommerceAPI/InvalidDescriptionError) [`object InvalidDisplayNameError`](/documentation/AdvancedCommerceAPI/InvalidDisplayNameError) [`object InvalidOfferPeriodCountError`](/documentation/AdvancedCommerceAPI/InvalidOfferPeriodCountError) [`object InvalidOfferPeriodError`](/documentation/AdvancedCommerceAPI/InvalidOfferPeriodError) [`object InvalidOfferPriceError`](/documentation/AdvancedCommerceAPI/InvalidOfferPriceError) [`object InvalidOfferReasonError`](/documentation/AdvancedCommerceAPI/InvalidOfferReasonError) [`object InvalidOperationError`](/documentation/AdvancedCommerceAPI/InvalidOperationError) [`object InvalidPreviousSubscriptionError`](/documentation/AdvancedCommerceAPI/InvalidPreviousSubscriptionError) [`object InvalidPreviousTransactionIDError`](/documentation/AdvancedCommerceAPI/InvalidPreviousTransactionIDError) [`object InvalidPriceForChangeItemInPriceIncreaseError`](/documentation/AdvancedCommerceAPI/InvalidPriceForChangeItemInPriceIncreaseError) [`object InvalidProductChangesError`](/documentation/AdvancedCommerceAPI/InvalidProductChangesError) [`object InvalidProductError`](/documentation/AdvancedCommerceAPI/InvalidProductError) [`object InvalidProratedPriceError`](/documentation/AdvancedCommerceAPI/InvalidProratedPriceError) [`object InvalidProratedPriceForChangeItemWithEffectiveLaterError`](/documentation/AdvancedCommerceAPI/InvalidProratedPriceForChangeItemWithEffectiveLaterError) [`object InvalidRefundReasonError`](/documentation/AdvancedCommerceAPI/InvalidRefundReasonError) [`object InvalidRefundTypeError`](/documentation/AdvancedCommerceAPI/InvalidRefundTypeError) [`object InvalidRenewalPeriodError`](/documentation/AdvancedCommerceAPI/InvalidRenewalPeriodError) [`object InvalidRenewalPriceError`](/documentation/AdvancedCommerceAPI/InvalidRenewalPriceError) [`object InvalidRequestReferenceIDError`](/documentation/AdvancedCommerceAPI/InvalidRequestReferenceIDError) [`object InvalidSalableDurationError`](/documentation/AdvancedCommerceAPI/InvalidSalableDurationError) [`object InvalidSalableError`](/documentation/AdvancedCommerceAPI/InvalidSalableError) [`object InvalidSignatureError`](/documentation/AdvancedCommerceAPI/InvalidSignatureError) [`object InvalidSKUError`](/documentation/AdvancedCommerceAPI/InvalidSKUError) [`object InvalidSKUProvidedMustBeCurrentSKUSetToRenewError`](/documentation/AdvancedCommerceAPI/InvalidSKUProvidedMustBeCurrentSKUSetToRenewError) [`object InvalidStorefrontError`](/documentation/AdvancedCommerceAPI/InvalidStorefrontError) [`object InvalidTargetProductIDError`](/documentation/AdvancedCommerceAPI/InvalidTargetProductIDError) [`object InvalidTaxProductCodeError`](/documentation/AdvancedCommerceAPI/InvalidTaxProductCodeError) [`object InvalidTransactionIdError`](/documentation/AdvancedCommerceAPI/InvalidTransactionIdError) [`object ItemCannotBeSpecifiedMultipleTimesError`](/documentation/AdvancedCommerceAPI/ItemCannotBeSpecifiedMultipleTimesError) [`object ItemLimitExceededError`](/documentation/AdvancedCommerceAPI/ItemLimitExceededError) [`object MalformedPayloadError`](/documentation/AdvancedCommerceAPI/MalformedPayloadError) [`object MisalignedBillingCycleError`](/documentation/AdvancedCommerceAPI/MisalignedBillingCycleError) [`object MigrationNotAllowedWhenPriceIncreaseCommunicatedError`](/documentation/AdvancedCommerceAPI/MigrationNotAllowedWhenPriceIncreaseCommunicatedError) [`object MismatchedStorefrontError`](/documentation/AdvancedCommerceAPI/MismatchedStorefrontError) [`object MissingPricingConfigForStorefrontError`](/documentation/AdvancedCommerceAPI/MissingPricingConfigForStorefrontError) [`object MissingUpdatedItemsWithPeriodChangeError`](/documentation/AdvancedCommerceAPI/MissingUpdatedItemsWithPeriodChangeError) [`object MoreItemsThanAllowedError`](/documentation/AdvancedCommerceAPI/MoreItemsThanAllowedError) [`object MoreOffersThanAllowedError`](/documentation/AdvancedCommerceAPI/MoreOffersThanAllowedError) [`object MultipleOperationsOnSingleSKUError`](/documentation/AdvancedCommerceAPI/MultipleOperationsOnSingleSKUError) [`object MultiplePricesError`](/documentation/AdvancedCommerceAPI/MultiplePricesError) [`object NegativePriceError`](/documentation/AdvancedCommerceAPI/NegativePriceError) [`object NegativeProratedPriceError`](/documentation/AdvancedCommerceAPI/NegativeProratedPriceError) [`object NegativeRefundAmountError`](/documentation/AdvancedCommerceAPI/NegativeRefundAmountError) [`object NullAdvancedCommerceDataError`](/documentation/AdvancedCommerceAPI/NullAdvancedCommerceDataError) [`object NullCurrencyError`](/documentation/AdvancedCommerceAPI/NullCurrencyError) [`object NullCurrentSKUError`](/documentation/AdvancedCommerceAPI/NullCurrentSKUError) [`object NullDescriptionError`](/documentation/AdvancedCommerceAPI/NullDescriptionError) [`object NullDescriptorsError`](/documentation/AdvancedCommerceAPI/NullDescriptorsError) [`object NullDisplayNameError`](/documentation/AdvancedCommerceAPI/NullDisplayNameError) [`object NullEffectiveError`](/documentation/AdvancedCommerceAPI/NullEffectiveError) [`object NullItemError`](/documentation/AdvancedCommerceAPI/NullItemError) [`object NullItemsError`](/documentation/AdvancedCommerceAPI/NullItemsError) [`object NullNewSKUError`](/documentation/AdvancedCommerceAPI/NullNewSKUError) [`object NullOfferPeriodError`](/documentation/AdvancedCommerceAPI/NullOfferPeriodError) [`object NullPeriodCountError`](/documentation/AdvancedCommerceAPI/NullPeriodCountError) [`object NullPeriodError`](/documentation/AdvancedCommerceAPI/NullPeriodError) [`object NullPriceError`](/documentation/AdvancedCommerceAPI/NullPriceError) [`object NullReasonError`](/documentation/AdvancedCommerceAPI/NullReasonError) [`object NullRefundAmountError`](/documentation/AdvancedCommerceAPI/NullRefundAmountError) [`object NullRefundReasonError`](/documentation/AdvancedCommerceAPI/NullRefundReasonError) [`object NullRefundRiskingError`](/documentation/AdvancedCommerceAPI/NullRefundRiskingError) [`object NullRefundTypeError`](/documentation/AdvancedCommerceAPI/NullRefundTypeError) [`object NullRequestInfoError`](/documentation/AdvancedCommerceAPI/NullRequestInfoError) [`object NullRequestReferenceIDError`](/documentation/AdvancedCommerceAPI/NullRequestReferenceIDError) [`object NullRetainBillingCycleError`](/documentation/AdvancedCommerceAPI/NullRetainBillingCycleError) [`object NullSKUError`](/documentation/AdvancedCommerceAPI/NullSKUError) [`object NullStorefrontError`](/documentation/AdvancedCommerceAPI/NullStorefrontError) [`object NullTargetProductIDError`](/documentation/AdvancedCommerceAPI/NullTargetProductIDError) [`object NullTaxCodeError`](/documentation/AdvancedCommerceAPI/NullTaxCodeError) [`object NullTransactionIdError`](/documentation/AdvancedCommerceAPI/NullTransactionIdError) [`object NullVersionError`](/documentation/AdvancedCommerceAPI/NullVersionError) [`object OfferPreventsItemMidCycleChangeError`](/documentation/AdvancedCommerceAPI/OfferPreventsItemMidCycleChangeError) [`object OneItemNeededInModifyError`](/documentation/AdvancedCommerceAPI/OneItemNeededInModifyError) [`object OperationNotAllowedError`](/documentation/AdvancedCommerceAPI/OperationNotAllowedError) [`object PartialSimulateRefundDeclineError`](/documentation/AdvancedCommerceAPI/PartialSimulateRefundDeclineError) [`object PendingChangesMismatchError`](/documentation/AdvancedCommerceAPI/PendingChangesMismatchError) [`object PendingRefundError`](/documentation/AdvancedCommerceAPI/PendingRefundError) [`object PeriodChangeEffectiveConflictError`](/documentation/AdvancedCommerceAPI/PeriodChangeEffectiveConflictError) [`object PeriodChangeImmediateWithEffectiveAtNextBillingCycleError`](/documentation/AdvancedCommerceAPI/PeriodChangeImmediateWithEffectiveAtNextBillingCycleError) [`object PeriodCountNotPositiveError`](/documentation/AdvancedCommerceAPI/PeriodCountNotPositiveError) [`object PeriodResetWithRetainBillingCycleError`](/documentation/AdvancedCommerceAPI/PeriodResetWithRetainBillingCycleError) [`object PriceChangeCannotBeIssuedWhenAlreadyCommunicatedError`](/documentation/AdvancedCommerceAPI/PriceChangeCannotBeIssuedWhenAlreadyCommunicatedError) [`object PriceChangeNotSupportedThroughModifyItemsError`](/documentation/AdvancedCommerceAPI/PriceChangeNotSupportedThroughModifyItemsError) [`object ProductAlreadyExistsError`](/documentation/AdvancedCommerceAPI/ProductAlreadyExistsError) [`object ProductNotEligibleError`](/documentation/AdvancedCommerceAPI/ProductNotEligibleError) [`object ProductNotFoundError`](/documentation/AdvancedCommerceAPI/ProductNotFoundError) [`object ProductNotOwnedError`](/documentation/AdvancedCommerceAPI/ProductNotOwnedError) [`object ProratedOnlyLatestTransactionError`](/documentation/AdvancedCommerceAPI/ProratedOnlyLatestTransactionError) [`object RateLimitExceededError`](/documentation/AdvancedCommerceAPI/RateLimitExceededError) [`object RefundAmountWithoutCustomError`](/documentation/AdvancedCommerceAPI/RefundAmountWithoutCustomError) [`object RemovalAllNotAllowedError`](/documentation/AdvancedCommerceAPI/RemovalAllNotAllowedError) [`object RemoveAllItemsNotAllowedError`](/documentation/AdvancedCommerceAPI/RemoveAllItemsNotAllowedError) [`object RemoveItemNotFoundError`](/documentation/AdvancedCommerceAPI/RemoveItemNotFoundError) [`object RemoveItemsWithoutAddOrChangeItemsError`](/documentation/AdvancedCommerceAPI/RemoveItemsWithoutAddOrChangeItemsError) [`object RepeatedRequestReferenceIdError`](/documentation/AdvancedCommerceAPI/RepeatedRequestReferenceIdError) [`object RevokeOnInactiveSubscriptionError`](/documentation/AdvancedCommerceAPI/RevokeOnInactiveSubscriptionError) [`object SimulateRefundDeclineOnlyInSandboxError`](/documentation/AdvancedCommerceAPI/SimulateRefundDeclineOnlyInSandboxError) [`object SKULengthExceededError`](/documentation/AdvancedCommerceAPI/SKULengthExceededError) [`object StorefrontChangeError`](/documentation/AdvancedCommerceAPI/StorefrontChangeError) [`object SubscriptionAlreadyActiveError`](/documentation/AdvancedCommerceAPI/SubscriptionAlreadyActiveError) [`object SubscriptionAlreadyExistsError`](/documentation/AdvancedCommerceAPI/SubscriptionAlreadyExistsError) [`object SubscriptionAlreadyMigratedError`](/documentation/AdvancedCommerceAPI/SubscriptionAlreadyMigratedError) [`object SubscriptionDoesNotExistError`](/documentation/AdvancedCommerceAPI/SubscriptionDoesNotExistError) [`object SubscriptionNotEligibleError`](/documentation/AdvancedCommerceAPI/SubscriptionNotEligibleError) [`object TransactionIdNotFoundError`](/documentation/AdvancedCommerceAPI/TransactionIdNotFoundError) [`object TransactionNotRefundableError`](/documentation/AdvancedCommerceAPI/TransactionNotRefundableError) [`object TransactionCannotBeRefundedContactSupportError`](/documentation/AdvancedCommerceAPI/TransactionCannotBeRefundedContactSupportError) [`object UnauthorizedError`](/documentation/AdvancedCommerceAPI/UnauthorizedError) [`object UnexpectedVersionError`](/documentation/AdvancedCommerceAPI/UnexpectedVersionError) --- Copyright © 2026 Apple Inc. 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