What does productAlreadyPurchasedError (code 6) mean in the purchases SDK?

The purchases SDK raises productAlreadyPurchasedError (code 6) when the store refuses to sell a product the customer already owns.

Quick facts#


Error	`ErrorCode.productAlreadyPurchasedError` (iOS), `PurchasesErrorCode.ProductAlreadyPurchasedError` (Android), code 6
Where	Purchases SDK (iOS, Android and the hybrid SDKs built on them)
What the vendor says	This product is already active for the user.

Cause#

Android: Play Billing ITEM_ALREADY_OWNED. Google says it is usually permanent but can be stale cache, and recommends queryPurchasesAsync().
StoreKit 1: an unknown SKError whose underlying error says the customer is currently subscribed.
On Android, the backend answered 7852 (a web purchase that belongs to another user); iOS reports that as purchaseBelongsToOtherUser instead.

Fix#

Call getCustomerInfo and check the entitlement. If it is active, close the paywall.
If it is not active, call restorePurchases() so the SDK posts the owned purchase.
On Android, acknowledge or consume purchases so they do not stay owned and block a second purchase.
Hide the buy button for owners by checking the entitlement before you show the paywall.

Example#

Swift

// The purchases SDK throws `ErrorCode` values; match the one you handle and let the rest fall through.
func handle(_ error: Error) {
    guard let code = error as? ErrorCode else {
        print("Not a purchases SDK error: \(error)")
        return
    }
    switch code {
    case .productAlreadyPurchasedError:
        // Good news: the customer already owns it. Refresh customer info or restore, then close the paywall.
        print("Already purchased; restore or refresh customer info")
    default:
        print("Other purchases error: \(code.description)")
    }
}

Compile-checked: npm run check:snippets type-checks this snippet with swiftc together with the ErrorCode.swift file of the RevenueDot purchases-ios fork (checked 2026-10-03).

How the RevenueDot SDK reports it#

Deep dive: revenuedot.app/errors/product-already-purchased-error. See also how to restore purchases.

Source#

Checked: 2026-10-03

Edit this page on GitHub ↗ View as Markdown Last updated October 3, 2026