# Inviting Guest Buyers to Create an Account: A/B Test

Page: https://alidemirbas.com.tr/en/lab/ab-test-library/tests/inviting-guest-buyers-to-create-an-account-ab-test

## Hypothesis

If guest buyers see an optional account invitation after checkout that can use details they have already given, creating an account may feel like less effort. That could raise the account creation rate among assigned guest buyers.

## When to run this test

Support requests about order status, repeat guest checkouts with the same email, or visitors looking for a way to track an order all hint that guest buyers need an account after ordering. Expect some buyers who see the invitation to open an account without meeting a new hurdle after their order. If the requests stem from missing order-status emails, fix those first; an invitation will not solve that. Leave guest checkout untouched in this test; if checkout gets harder to push accounts, you are no longer measuring the invitation.

## Primary metric

**Account creation rate**: Compare account creation among all assigned guest buyers after the order is complete.

## Other metrics

- **Repeat purchase rate**: Compare all assigned guest buyers over the same predefined 30-, 60- or 90-day window, not only those who create an account.
- **Email verification completion**: Report verification among account starters and completed accounts per assigned guest buyer.
- **Account-invitation support requests**: Track questions about order or account status using the same denominator.

## What to check before and during the test

- **Invitation**: Add one fixed, optional account invitation after guest checkout.
- **Prefill**: Decide which previously supplied details can be used and keep the rule consistent.
- **Decline**: After dismissal, preserve access to the order and future guest checkout.
- **Placement**: Use one fixed location that does not cover the order summary.
- **Purchase history**: Review first-time and repeat guest buyers separately.

## What to watch when reading the result

- Even if account creation rate rises, do not judge repeat purchases by looking only at buyers who opened an account, because they are a self-selected group. Compare repeat purchase rate across all assigned guest buyers over the follow-up window you chose in advance, and do not treat a new account as marketing consent.
- Check that order details stay visible regardless of the invitation and that it never suggests the order is unfinished. If account-invitation support requests go up, buyers may be unsure about the status of their order.
- Confirm that a declined invitation does not appear again in the same session and that the form is prefilled only with details the buyer explicitly provided. Read first-time and repeat guest buyers separately, since the two groups may respond to the invitation differently. Keep the invitation wording and prefill behavior fixed in this test; if both change, you cannot tell which one caused the difference.
- A gap in account creation may become clear early, but repeat purchases can only be read once the follow-up window ends, so do not finalize the ship decision before then. To check whether the difference in completed accounts could be chance, compare each arm's assigned guest buyers and completed accounts with the [A/B test significance calculator](https://alidemirbas.com.tr/en/calculators/ab-test).

## Frequently Asked Questions

### How should an account invitation preserve order confirmation?

Order details must remain accessible without creating an account. The invitation must not imply the purchase is unfinished. Fix one location that does not cover the summary. Use account creation per assigned guest buyer as the primary outcome.

### What should be tracked beyond account creation?

Compare repeat purchases across all assigned guest buyers over a window suited to the purchase cycle. Account creators are a selected subset. Report email verification among account starters and all eligible assigned buyers separately.

### Does creating an account grant marketing permission?

No. Preserve order access and future guest purchases when the invitation is declined, and do not repeat it in the same session. Keep guest checkout unchanged. Do not prefill information the user has not explicitly provided.