# Adds buyer ID support for BLIK payments ## What’s new Adds the [buyer_id](https://docs.stripe.com/api/payment_methods/object.md?api-version=2026-06-24.dahlia#payment_method_object-blik-buyer_id) property to the [blik](https://docs.stripe.com/api/payment_methods/object.md?api-version=2026-06-24.dahlia#payment_method_object-blik) hash on the [PaymentMethod](https://docs.stripe.com/api/payment_methods/object.md?api-version=2026-06-24.dahlia) object and to the [payment_method_details.blik](https://docs.stripe.com/api/setup_attempts/object.md?api-version=2026-06-24.dahlia#setup_attempt_object-payment_method_details-blik) hash on the [SetupAttempt](https://docs.stripe.com/api/setup_attempts/object.md?api-version=2026-06-24.dahlia) object. The `buyer_id` property is a unique merchant-scoped identifier that helps identify the specific account holder making the payment. The `buyer_id` property was previously available only on [Charges](https://docs.stripe.com/api/charges/object.md?api-version=2026-06-24.preview#charge_object-payment_method_details-blik-buyer_id). ## Impact You can now access buyer identification information for BLIK PaymentMethods and SetupAttempts through the `buyer_id` property. This additional data point can help you: - Implement sophisticated fraud detection rules - Meet compliance requirements for payment monitoring - Correlate payments from the same customer across multiple transactions and payment methods The `buyer_id` property is read-only and populated automatically when provided by BLIK. No changes to your existing BLIK payment integration are required. ## Changes #### REST API | Parameter | Change | Resources or endpoints | | --- | --- | --- | | `buyer_id` | Added | [ConfirmationToken.payment_method_preview.blik](/api/confirmation_tokens/object?api-version=2026-06-24.dahlia#confirmation_token_object-payment_method_preview-blik), [PaymentMethod.blik](/api/payment_methods/object?api-version=2026-06-24.dahlia#payment_method_object-blik) | #### Ruby | Parameter | Change | Resources or methods | | --- | --- | --- | | `buyer_id` | Added | [ConfirmationToken::PaymentMethodPreview::Blik](/api/confirmation_tokens/object?api-version=2026-06-24.dahlia#confirmation_token_object-payment_method_preview-blik), [PaymentMethod::Blik](/api/payment_methods/object?api-version=2026-06-24.dahlia#payment_method_object-blik) | #### Python | Parameter | Change | Resources or methods | | --- | --- | --- | | `buyer_id` | Added | [ConfirmationToken.PaymentMethodPreview.Blik](/api/confirmation_tokens/object?api-version=2026-06-24.dahlia#confirmation_token_object-payment_method_preview-blik), [PaymentMethod.Blik](/api/payment_methods/object?api-version=2026-06-24.dahlia#payment_method_object-blik) | #### PHP | Parameter | Change | Resources or methods | | --- | --- | --- | | `buyer_id` | Added | [ConfirmationToken.payment_method_preview.blik](/api/confirmation_tokens/object?api-version=2026-06-24.dahlia#confirmation_token_object-payment_method_preview-blik), [PaymentMethod.blik](/api/payment_methods/object?api-version=2026-06-24.dahlia#payment_method_object-blik) | #### Java | Parameter | Change | Resources or methods | | --- | --- | --- | | `buyerId` | Added | [ConfirmationToken.payment_method_preview.blik](/api/confirmation_tokens/object?api-version=2026-06-24.dahlia#confirmation_token_object-payment_method_preview-blik), [PaymentMethod.blik](/api/payment_methods/object?api-version=2026-06-24.dahlia#payment_method_object-blik) | #### Node.js | Parameter | Change | Resources or methods | | --- | --- | --- | | `buyer_id` | Added | [ConfirmationToken.payment_method_preview.blik](/api/confirmation_tokens/object?api-version=2026-06-24.dahlia#confirmation_token_object-payment_method_preview-blik), [PaymentMethod.blik](/api/payment_methods/object?api-version=2026-06-24.dahlia#payment_method_object-blik) | #### Go | Parameter | Change | Resources or methods | | --- | --- | --- | | `BuyerID` | Added | [ConfirmationTokenPaymentMethodPreviewBlik](/api/confirmation_tokens/object?api-version=2026-06-24.dahlia#confirmation_token_object-payment_method_preview-blik), [PaymentMethodBlik](/api/payment_methods/object?api-version=2026-06-24.dahlia#payment_method_object-blik) | #### .NET | Parameter | Change | Resources or methods | | --- | --- | --- | | `BuyerId` | Added | [ConfirmationToken.PaymentMethodPreview.Blik](/api/confirmation_tokens/object?api-version=2026-06-24.dahlia#confirmation_token_object-payment_method_preview-blik), [PaymentMethod.Blik](/api/payment_methods/object?api-version=2026-06-24.dahlia#payment_method_object-blik) | ## Upgrade #### REST API 1. [View your current API version](https://docs.stripe.com/upgrades.md#view-your-api-version-and-the-latest-available-upgrade-in-workbench) in Workbench. 2. If you use an SDK, upgrade to the corresponding SDK version for this API version. - If you don’t use an SDK, update your [API requests](https://docs.stripe.com/api/versioning.md) to include `Stripe-Version: 2026-06-24.dahlia` 3. Upgrade the API version used for [webhook endpoints](https://docs.stripe.com/webhooks/versioning.md). 4. [Test your integration](https://docs.stripe.com/testing.md) against the new version. 5. If you use Connect, [test your Connect integration](https://docs.stripe.com/connect/testing.md). 6. In Workbench, [perform the upgrade](https://docs.stripe.com/upgrades.md#perform-the-upgrade). You can [roll back the version](https://docs.stripe.com/upgrades.md#roll-back-your-api-version) for 72 hours. Learn more about [Stripe API upgrades](https://docs.stripe.com/upgrades.md). #### Ruby 1. [View your current API version](https://docs.stripe.com/upgrades.md#view-your-api-version-and-the-latest-available-upgrade-in-workbench) in Workbench. 2. Upgrade your Ruby SDK to the latest version. 3. Upgrade the API version used for [webhook endpoints](https://docs.stripe.com/webhooks/versioning.md). 4. [Test your integration](https://docs.stripe.com/testing.md) against the new version. 5. If you use Connect, [test your Connect integration](https://docs.stripe.com/connect/testing.md). 6. In Workbench, [perform the upgrade](https://docs.stripe.com/upgrades.md#perform-the-upgrade). You can [roll back the version](https://docs.stripe.com/upgrades.md#roll-back-your-api-version) for 72 hours. Learn more about [Stripe API upgrades](https://docs.stripe.com/upgrades.md). #### Python 1. [View your current API version](https://docs.stripe.com/upgrades.md#view-your-api-version-and-the-latest-available-upgrade-in-workbench) in Workbench. 2. Upgrade your Python SDK to the latest version. 3. Upgrade the API version used for [webhook endpoints](https://docs.stripe.com/webhooks/versioning.md). 4. [Test your integration](https://docs.stripe.com/testing.md) against the new version. 5. If you use Connect, [test your Connect integration](https://docs.stripe.com/connect/testing.md). 6. In Workbench, [perform the upgrade](https://docs.stripe.com/upgrades.md#perform-the-upgrade). You can [roll back the version](https://docs.stripe.com/upgrades.md#roll-back-your-api-version) for 72 hours. Learn more about [Stripe API upgrades](https://docs.stripe.com/upgrades.md). #### PHP 1. [View your current API version](https://docs.stripe.com/upgrades.md#view-your-api-version-and-the-latest-available-upgrade-in-workbench) in Workbench. 2. Upgrade your PHP SDK to the latest version. 3. Upgrade the API version used for [webhook endpoints](https://docs.stripe.com/webhooks/versioning.md). 4. [Test your integration](https://docs.stripe.com/testing.md) against the new version. 5. If you use Connect, [test your Connect integration](https://docs.stripe.com/connect/testing.md). 6. In Workbench, [perform the upgrade](https://docs.stripe.com/upgrades.md#perform-the-upgrade). You can [roll back the version](https://docs.stripe.com/upgrades.md#roll-back-your-api-version) for 72 hours. Learn more about [Stripe API upgrades](https://docs.stripe.com/upgrades.md). #### Java 1. [View your current API version](https://docs.stripe.com/upgrades.md#view-your-api-version-and-the-latest-available-upgrade-in-workbench) in Workbench. 2. Upgrade your Java SDK to the latest version. 3. Upgrade the API version used for [webhook endpoints](https://docs.stripe.com/webhooks/versioning.md). 4. [Test your integration](https://docs.stripe.com/testing.md) against the new version. 5. If you use Connect, [test your Connect integration](https://docs.stripe.com/connect/testing.md). 6. In Workbench, [perform the upgrade](https://docs.stripe.com/upgrades.md#perform-the-upgrade). You can [roll back the version](https://docs.stripe.com/upgrades.md#roll-back-your-api-version) for 72 hours. Learn more about [Stripe API upgrades](https://docs.stripe.com/upgrades.md). #### Node.js 1. [View your current API version](https://docs.stripe.com/upgrades.md#view-your-api-version-and-the-latest-available-upgrade-in-workbench) in Workbench. 2. Upgrade your Node SDK to the latest version. 3. Upgrade the API version used for [webhook endpoints](https://docs.stripe.com/webhooks/versioning.md). 4. [Test your integration](https://docs.stripe.com/testing.md) against the new version. 5. If you use Connect, [test your Connect integration](https://docs.stripe.com/connect/testing.md). 6. In Workbench, [perform the upgrade](https://docs.stripe.com/upgrades.md#perform-the-upgrade). You can [roll back the version](https://docs.stripe.com/upgrades.md#roll-back-your-api-version) for 72 hours. Learn more about [Stripe API upgrades](https://docs.stripe.com/upgrades.md). #### Go 1. [View your current API version](https://docs.stripe.com/upgrades.md#view-your-api-version-and-the-latest-available-upgrade-in-workbench) in Workbench. 2. Upgrade your Go SDK to the latest version. 3. Upgrade the API version used for [webhook endpoints](https://docs.stripe.com/webhooks/versioning.md). 4. [Test your integration](https://docs.stripe.com/testing.md) against the new version. 5. If you use Connect, [test your Connect integration](https://docs.stripe.com/connect/testing.md). 6. In Workbench, [perform the upgrade](https://docs.stripe.com/upgrades.md#perform-the-upgrade). You can [roll back the version](https://docs.stripe.com/upgrades.md#roll-back-your-api-version) for 72 hours. Learn more about [Stripe API upgrades](https://docs.stripe.com/upgrades.md). #### .NET 1. [View your current API version](https://docs.stripe.com/upgrades.md#view-your-api-version-and-the-latest-available-upgrade-in-workbench) in Workbench. 2. Upgrade your .NET SDK to the latest version. 3. Upgrade the API version used for [webhook endpoints](https://docs.stripe.com/webhooks/versioning.md). 4. [Test your integration](https://docs.stripe.com/testing.md) against the new version. 5. If you use Connect, [test your Connect integration](https://docs.stripe.com/connect/testing.md). 6. In Workbench, [perform the upgrade](https://docs.stripe.com/upgrades.md#perform-the-upgrade). You can [roll back the version](https://docs.stripe.com/upgrades.md#roll-back-your-api-version) for 72 hours. Learn more about [Stripe API upgrades](https://docs.stripe.com/upgrades.md). ## Related changes - [Adds buyer ID support for Bizum payments](https://docs.stripe.com/changelog/dahlia/2026-06-24/bizum-payments-buyer-id.md) - [Enables manual capture for Sunbit payments](https://docs.stripe.com/changelog/dahlia/2026-06-24/enables-manual-capture-for-sunbit-payments.md) - [Adds a fingerprint to Pix payment method details](https://docs.stripe.com/changelog/dahlia/2026-06-24/pix-fingerprint-payment-method-details.md) - [Adds transaction link ID to card payment method details for Mastercard and Maestro transactions](https://docs.stripe.com/changelog/dahlia/2026-06-24/card-payment-method-details-transaction-link-id.md) - [Adds payment method options for Sunbit in Checkout Sessions](https://docs.stripe.com/changelog/dahlia/2026-06-24/sunbit-checkout-pmo.md) - [Adds support for the Sui network and USDsui token for crypto payments](https://docs.stripe.com/changelog/dahlia/2026-06-24/sui-network-and-usdsui-token-support.md) - [Adds support for Mastercard compliance disputes](https://docs.stripe.com/changelog/dahlia/2026-06-24/mastercard-compliance-disputes.md) - [Adds support for recurring payments with Satispay](https://docs.stripe.com/changelog/dahlia/2026-06-24/satispay-recurring-payments.md)