← Supported exchanges
HA
HashKey
Tier 3USDT · BEP-20 payout
Refund
25%
of every trading commission, paid back as USDT.
Sign up via fendfee's referral
Use the official partner code FENDFEE or click below.
Submit your UID
Find your UID in HashKey's account section. Auto-matching happens in minutes.
Trade as usual
Your daily refund accrues automatically. Withdraw any time over $10.
Where to find your HashKey UID
Look for 'UID' in your exchange's profile or account section — usually a long number under your nickname.
Example12345678
Already have an account?
The simplest fallback is registering a fresh account or sub-account through our referral link.
KYC / referral transfer
Email support@fendfee.com with your exchange and existing UID; we'll guide you through whatever transfer flow that exchange supports.