The Lighter referral code is UNDEFINED. It looks like a page error, but it is a real, working code. Open app.lighter.xyz/?referral=UNDEFINED and connect your wallet. Lighter prompts users who join through a referral link to activate one week of Premium for free.
Referral code: UNDEFINED
Code: UNDEFINED
Signup link: https://app.lighter.xyz/?referral=UNDEFINED
Benefit: 7 days of Premium, fees rebated, up to $10,000,000 of volume
Checked: 8 October 2026 against the Lighter referral docs
What UNDEFINED gives you
A free Premium week. Premium trading fees are rebated for 7 days, on up to $10 million of volume.
Rebates are paid weekly as transfers on Lighter, with a $1 minimum.
Applies to referrals made from 28 July 2026.
The code cannot be added or changed after sign-up.
Why Premium matters when Standard is free
Account | Maker | Taker | Taker latency |
Standard (default) | 0% | 0% | about 300 ms |
Premium | 0.0040% | 0.0280% | about 140 ms |
Premium, 500,000 LIT staked | 0.0028% | 0.0196% | about 140 ms |
Standard already costs nothing. Premium is faster but has a fee. The referral week lets you try Premium free. Source: Lighter trading fees.
How to sign up with UNDEFINED
Check that Lighter is available where you live (see FAQ).
Connect your wallet. Lighter records the referral on this first connection.
Accept the free Premium week when Lighter prompts you.
Deposit through the Universal Deposit Address. It accepts USDC, USDT, ETH, SOL, BTC and more from 12 chains. The minimum for a new account is $5 ($10 from Bitcoin).
What competing codes get wrong
Some Lighter codes promise a 5% bonus, point boosts or early access. Lighter's docs mention none of that for referred users. Early access ended with the invite-only beta in 2025.
Points status
Seasons 1 and 2 ended with the LIT genesis distribution on 30 December 2025. Since 10 August 2026, Lighter has run a points programme for Lighter on Robinhood Chain, with weekly drops on Fridays and double points for Robinhood Wallet trades. Season 3 has been teased but not announced.
FAQ
Is UNDEFINED really a code?
Yes. It is a real referral code, not a broken link.
Can I add it after I have connected my wallet?
No. Lighter's docs say the referral code cannot be added or changed after sign-up.
Is Lighter available in the US?
No. Lighter's terms bar the United States, Canada, the United Kingdom, China, North Korea, Russia, Ukraine, Cuba, Iran, Venezuela, Sudan, Belarus, Myanmar, Syria and sanctioned persons.
Disclosure: this page contains referral links. We earn a share of referee fees through Lighter's referral program. Perpetual futures use leverage and can lose more than your margin. Not financial advice.