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

# Invites & fraud protection

> Email-a-friend invites, verification, and the settings that keep your program honest.

## Referral invites

Members can invite friends by email straight from the landing page and
widgets. The **Invitation email** template (Referral → Emails) controls
what the friend receives — optionally including the coupon code itself
(**Include the coupon code in the invitation email**).

Guardrails are built in: self-invites are rejected ("Self invite is
invalid!"), duplicate invites are caught ("Invitation already sent!"),
and there's a maximum invite limit per member.

Track invites under **Referral → Sales & Analytics → Referral Invites**
— each row shows referrer, friend, and status (**Invited** →
**Successful** once the friend purchases). A per-member **Invite
History** lives on each member's profile.

## Fraud protection

Referral programs attract freeloaders; Shopjar ships several layers
(Referral → Settings → Fraud Protection, unless noted):

| Protection                      | What it does                                                                                    | Plan      |
| ------------------------------- | ----------------------------------------------------------------------------------------------- | --------- |
| Safe Referral Reward Popup      | Captures and verifies the friend's email before unlocking any reward                            | Free      |
| Lock rewards to verified emails | Friends must check out with the same email they used to claim — codes can't be shared or resold | Essential |
| OTP Verification for Referral   | The friend must enter a one-time code emailed to them before claiming                           | Growth    |
| Membership eligibility          | "Who can become a member": **Anyone** or **Only existing customers with at least one order**    | Essential |
| IP-based fraud detection        | Detects self-referrals from the same device/network — flagged as "Fraud via IP" in reports      | Growth    |

IP fraud protection is enabled app-wide under **Settings → General →
Enable IP based Advanced Fraud Protection**.

<Tip>
  Layer them by risk: the safe popup + first-order condition stops
  casual abuse; verified-email locking stops code resellers; IP
  detection catches determined self-referrers. Turn on what your
  margins justify.
</Tip>

## Use cases & examples

<AccordionGroup>
  <Accordion title="Stop coupon-site leakage" icon="lock" description="Verified-email locking makes shared codes worthless.">
    Enable **Lock rewards to verified emails**. A code posted to a
    coupon site fails at checkout for anyone but the person who
    claimed it.
  </Accordion>

  <Accordion title="Customers-only referral program" icon="user-check" description="Only people who bought can refer.">
    Set membership eligibility to **Only existing customers with at
    least one order** — referrers vouch from experience, and fake
    accounts can't join to farm rewards.
  </Accordion>

  <Accordion title="High-discount program, maximum security" icon="shield" description="For rewards worth gaming: OTP + IP + verified email.">
    Offering 25%+ rewards? Enable all three Growth-tier protections.
    The friction is minor for genuine friends and decisive against
    fraud rings.
  </Accordion>
</AccordionGroup>

## Troubleshooting

<AccordionGroup>
  <Accordion title="A legitimate customer was flagged as fraud">
    IP detection flags shared networks (offices, households) too. Open
    the reward in **Referrer Rewards** and approve it manually — the
    flag is a hold, not a verdict.
  </Accordion>

  <Accordion title="Friends say they didn't get the reward email">
    Check the invitation and claim email templates are enabled
    (Referral → Emails), and consider a
    [custom sending domain](/emails/custom-domain) — emails
    from your own verified domain land in inboxes more reliably.
  </Accordion>
</AccordionGroup>

## Need help?

<CardGroup cols={3}>
  <Card title="Book a call" icon="calendar-days" href="https://cal.com/yukoteam/shopjar">
    Schedule a free call with our team for personal setup assistance.
  </Card>

  <Card title="Contact support" icon="comments" href="#crisp-chat">
    Chat with us directly — we're happy to help with any question.
  </Card>

  <Card title="Install Shopjar" icon="download" href="https://apps.shopify.com/referral-and-affiliates">
    Get [Shopjar Referral & Affiliate Marketing](https://apps.shopify.com/referral-and-affiliates) from the Shopify App Store.
  </Card>
</CardGroup>