Open your MEXC account through our link, finish identity verification and link your UID on ReturnFee. Steps 1–2 show the sign-up screen.
Before you start
An account opened without our link, or on a regional platform, cannot be linked. Sign up on the global site through our link.
Tap the sign-up button on this page. The MEXC sign-up page opens. Use our link, not the MEXC app or a search result, so the account is opened through us. Check that the referral code field already shows mexc-RETURNFEE, as in the green box. Leave it as it is.

Enter your email or phone number and tap Continue. Then set a password.

MEXC sends a code to your email or phone. Enter it on the sign-up screen.
Open the MEXC app and complete identity verification (KYC) as prompted, usually an ID document and a selfie.
In the MEXC app or on the website, open your profile. Your UID is shown there. Copy it.

Open ReturnFee, sign in and add the UID under your dashboard. Choose MEXC as the exchange.
Link your UID
Screenshots show the public MEXC sign-up page; the exchange may change its layout.