BYDFi Card User Guide
BYDFi Card allows you to use the USD balance in your Fiat Account to make global in-store and online purchases and withdrawals. Please read the following instructions carefully to ensure smooth transactions:
💰 Available Funds
- Only the USD balance in your Fiat Account can be used for payments.
- Fiat and Spot assets are held in separate accounts, and fund transfers must be done manually
- Even if your Spot Account holds crypto assets, automatic conversion to cover shortfalls is not supported.
- If your USD balance is insufficient to cover the purchase amount + applicable fees, the transaction will be declined.
💸 Fees Overview
| Fee Type | Rate |
|---|---|
| USDT-to-USD conversion (manual operation) | To USD Conversion Fee 1%; From USD Conversion Fee 0% |
| Forex fee on foreign currency purchases | 0% for USD purchases; 1% for other currencies |
💳 Spending & Withdrawal Limits
| Limit Type | Amount |
|---|---|
| Per transaction limit | 5,000 USD |
| Daily cumulative limit | 5,000 USD |
| Monthly cumulative limit | 50,000 USD |
⚠️ Transactions exceeding these limits will be rejected.
🕒 Authorization & Deduction Process
- Once a transaction is authorized, the corresponding amount will be frozen from your USD balance.
- The final deduction occurs when the merchant completes the transaction (up to 30 days).
- If the transaction is cancelled or not completed within the timeframe, the frozen amount will be released back to your available balance.
🧾 Transaction Examples
| Scenario | Product Price | USD Balance (Fiat Account) | Spot Account Balance | Currency | Result |
|---|---|---|---|---|---|
| 1 | 1,500 USD | 2,000 USD | 0 | USD | ✅ Success (Sufficient USD) |
| 2 | 1,030 USD | 1,000 USD | 1,000 USDT | USD | ❌ Fail (Crypto assets can’t cover shortfall) |
| 3 | 20 EUR | 100 USD | 0 | EUR | ✅ Success (USD covers 20 EUR + 1% fee) |
| 4 | 1,260 EUR | 1,300 USD | 0 | EUR | ❌ Fail (Insufficient USD for EUR + fees) |
| 5 | 50 USD | 0 | 1,000 USDT | USD | ❌ Fail (Crypto assets not available for card) |
📘 Case Studies
✅ Case 1: Sufficient Fiat Balance, Transaction Successful
Product price: 500 USD
Fiat Account USD balance: 1,000 USD
→ System deducts 500 USD directly, transaction completed.
❌ Case 2: Insufficient Fiat Balance, Crypto Cannot Cover
Product price: 1,030 USD
Fiat Account USD balance: 1,000 USD
Spot Account: 1,000 USDT
→ Shortfall of 30 USD cannot be covered by USDT, transaction fails.
✅ Case 3: Foreign Currency Purchase with Sufficient USD
Product price: 20 EUR (~23.04 USD)
Fiat Account USD balance: 100 USD
→ Assuming exchange rate 1.15 USD/EUR + 1% forex fee (~0.23 USD), total ~23.27 USD deducted.
❌ Case 4: Foreign Currency Purchase with Insufficient USD
Product price: 1,260 EUR (~1,451.31 USD)
Fiat Account USD balance: 1,300 USD
→ Actual cost ~1,465.82 USD including 1% forex fee, transaction fails due to insufficient funds.
❌ Case 5: Spot Assets Available but Not Usable for Card Payment
Product price: 50 USD
Fiat Account USD balance: 0 USD
Spot Account: 1,000 USDT
→ Even with sufficient crypto assets, the transaction fails.
📥 How to Top Up Your Fiat Account
To avoid transaction failures, please ensure sufficient funds in your Fiat Account by:
- Using the One-Click Buy feature to purchase USD (supports credit/debit cards).
- Depositing USD from other wallets/platforms into your Fiat Account.
- Transferring assets from Spot Account and manually converting them to USD (fees apply).
Stay tuned for the upcoming launch of the BYDFi physical card.
