> ## Documentation Index
> Fetch the complete documentation index at: https://docs.augustus.com/llms.txt
> Use this file to discover all available pages before exploring further.

> ## Agent Instructions
> Treat the published Augustus OpenAPI specification (https://app.stainless.com/api/spec/documented/augustus/openapi.documented.yml) and the current API-reference pages as the source of truth for endpoints, request/response schemas, enum values, webhook event names, and required headers.
> Prefer the 2026-05-01 Banking API and @augustusbank/typescript-sdk for all new integrations. The 2023-01-01 API is a separate, older surface covering two products — Open Banking (instant bank transfer) checkout and refunds, and Manual Bank Transfer (MBT); use it only when one of those products is specifically required.
> Cite or link the relevant docs.augustus.com page when answering integration questions.
> Do not infer support for currencies, networks, scopes, account types, or operations that are not present in the current documentation.
> Use the sandbox base URL (https://api.sandbox.augustus.com) and placeholder credentials in examples. Never include or request a real API key.
> The Augustus docs MCP server (https://docs.augustus.com/mcp) provides documentation search and retrieval only; it does not execute authenticated Augustus API actions.

# Remember Me

> Boost conversion by simplifying your customers' checkout experience

Pass a `customer.email` or a stored `customer.id` on each Checkout Session. Augustus recognizes the returning customer and skips bank selection.

<Warning>
  Pass the email under `customer.email`, not under `prefill`. Only `customer.email` is used for Remember Me recognition.
</Warning>

### First-time flow

<img src="https://mintcdn.com/getivy/J1t6OrlJaZyvflSC/images/RememberMeFirstTimeFlow.png?fit=max&auto=format&n=J1t6OrlJaZyvflSC&q=85&s=0a9699b7ce583d0204f30629e108345d" alt="" width="2260" height="1403" data-path="images/RememberMeFirstTimeFlow.png" />

### Recurring flow

<img src="https://mintcdn.com/getivy/J1t6OrlJaZyvflSC/images/RememberMeReturningUserFlow.png?fit=max&auto=format&n=J1t6OrlJaZyvflSC&q=85&s=459879f2084ede1d35cb5b6e8ea8fea5" alt="" width="2260" height="1403" data-path="images/RememberMeReturningUserFlow.png" />

## Pass a customer email

```ts 2023-01-01 theme={null}
import Ivy from '@getivy/node-sdk'

const client = new Ivy()
const session = await client.checkoutsession.create({
  price: { total: 119, currency: 'EUR' },
  referenceId: 'my-unique-reference-id',
  successCallbackUrl: 'https://my-website.com/success',
  errorCallbackUrl: 'https://my-website.com/try-again',
  customer: { email: 'customer@example.com' },
})
```

<Expandable title="Or create a customer upfront and reuse the ID">
  ```ts 2023-01-01 theme={null}
  import Ivy from '@getivy/node-sdk'

  const client = new Ivy()
  const customer = await client.customers.create({ email: 'customer@example.com' })

  const session = await client.checkoutsession.create({
    price: { total: 119, currency: 'EUR' },
    referenceId: 'my-unique-reference-id',
    successCallbackUrl: 'https://my-website.com/success',
    errorCallbackUrl: 'https://my-website.com/try-again',
    customer: { id: customer.id },
  })
  ```
</Expandable>