Crypto Virtual Card Glossary: 40 Terms Every Spender Should Know

First time I tried explaining to my accountant why "gas" had nothing to do with my car, I realized how much jargon the crypto payments world has accumulated. He was looking at a transaction labeled "ETH gas fee" and genuinely thought I'd expensed fuel on a crypto card.

Took 20 minutes. He still calls it "the blockchain toll."

If you're spending crypto through virtual cards — [VeloCards](https://velocards.com) or otherwise — you'll hit terms from three overlapping worlds: traditional payment processing (BINs, MCCs, AVS), cryptocurrency (gas, mempool, confirmations), and the hybrid space where they meet (on-ramps, stablecoins, tiered fees). Whether you're funding [ad campaigns](https://clickzprotect.com) or paying for [analytics tools](https://justanalytics.app), these terms apply.

Organized alphabetically. Jump to what you need. (And yes, I probably missed something — payments terminology multiplies faster than I can keep up.)

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A

**AVS (Address Verification System)** — Fraud check comparing your billing address at checkout against your card issuer's records. Mismatches trigger declines. Use exactly the address in your card dashboard, not your home address.

**Authorization Hold** — When merchants reserve funds before final settlement. A $200 hotel might hold $300. If your balance is $250, you're declined even though the charge would clear. Keep buffer on active cards.

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B

**BIN (Bank Identification Number)** — The first 6-8 digits of your card number. Identifies issuer and card type. This is the most important term here. Fraud filters make split-second decisions based on BINs. Prepaid BINs from fintechs get flagged; commercial credit BINs from major banks pass. [VeloCards](https://velocards.com) uses commercial credit BINs specifically for this reason — better acceptance at ad platforms, SaaS, and subscription services.

**Block Confirmation** — How many times a blockchain transaction has been validated. More confirmations = more finality. BTC needs 2-6 (20-60 min). ETH needs 12-20 (3-5 min). USDT on Tron: 1-2 minutes.

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C

**Card Creation Fee** — One-time charge for generating a new virtual card. [VeloCards](https://velocards.com/#pricing) ranges from $50 (Tier 1) to $15 (Tier 4) based on annual spend.

**Chargeback** — Cardholder dispute forcing merchant refund. Crypto cards handle these like traditional cards — the dispute is about the card transaction, not the underlying crypto.

**CVV/CVC** — The 3-digit security code. For virtual cards, it's in your dashboard. Some merchants require it every time; some only on first purchase.

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D

**Deposit Fee** — Percentage charged when loading crypto. VeloCards: 5% (Tier 1), 4% (Tier 2), 2.5% (Tier 3), 2% (Tier 4). On a $1,000 load, that's the difference between $50 and $20.

**DCC (Dynamic Currency Conversion)** — When merchants offer to charge in your "home currency." Always decline — their exchange rate is worse than your card issuer's.

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E

**EMV** — Chip standard for physical cards. Not relevant for virtual cards, but you'll see it in documentation.

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F

**FX Fee (Foreign Exchange Fee)** — Percentage charged on non-local currency purchases. If your card is USD and you buy from a UK merchant in GBP, someone's doing conversion. Some cards charge 0%, some charge 1-3%. For [ad buyers running global campaigns](https://clickzprotect.com), FX fees add up fast.

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G

**Gas Fee** — Transaction fee paid to blockchain validators. ETH gas varies wildly — $0.50 during low traffic, $50 during congestion. USDT on Tron is predictably cheap (usually under $1). Time large deposits for low-traffic periods.

Honestly? Gas fees are the most frustrating part of crypto payments. You think you're saving on off-ramp fees, then you try to load during a popular NFT mint and pay $40 in gas. Plan ahead.

**Gwei** — Unit for Ethereum gas prices. 1 gwei = 0.000000001 ETH. When gas is "20 gwei," multiply by 21,000 for a standard transfer cost. Or let your wallet calculate it.

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H

**HODL** — Slang for holding crypto long-term. Typo of "hold" from a 2013 forum post. Virtual cards let you spend without fully HODLing but also without off-ramping to your bank.

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I

**Issuer** — The institution that issues your card. For crypto cards, usually a fintech partnered with a traditional bank. The issuer determines BIN classification, fees, limits, and support quality. Pick a bad issuer and you're stuck with prepaid BINs that get declined everywhere. I learned this the hard way.

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K

**KYC (Know Your Customer)** — Identity verification. Typically government ID and proof of address. [VeloCards](https://velocards.com) lets you start with email-only (Tier 1: $100 lifetime limit, no KYC). Tier 2+ requires KYC but unlocks unlimited spending. Managing outreach via [cold email platforms](https://justemails.app)? Keep subscriptions on separate cards for cleaner accounting.

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L

**Limit (Spending Limit)** — Caps on spending per transaction, day, or month. Per-card limits are underrated fraud protection. A $150/transaction cap means stolen card numbers can't make $2,000 purchases.

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M

**MCC (Merchant Category Code)** — Four-digit code classifying merchant type. 5411 is grocery, 7311 is advertising (Google Ads), 7995 is gambling. You can block MCCs — if your card is for SaaS only, block gambling and wire transfers.

Fair warning: MCCs are frequently wrong. I've seen VPNs coded as "travel services." Spent 45 minutes on the phone with support once trying to figure out why a software purchase got declined — turns out the merchant was miscoded as a casino. Nobody's perfect.

**Mempool** — The "waiting room" for unconfirmed blockchain transactions. During congestion, it backs up. Higher gas = higher priority = faster inclusion.

**Monthly Fee** — Recurring account charge. VeloCards: $15/month across all tiers. Some competitors charge $0 monthly with higher transaction fees.

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N

**Network (Card Network)** — Visa, Mastercard, Amex, Discover. Most crypto cards are Visa or Mastercard. [VeloCards](https://velocards.com) supports both.

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O

**Off-Ramp** — Converting crypto to fiat. Traditional path: sell on exchange → withdraw to bank → wait 3-5 days → spend. Crypto cards skip steps 2-4. Load crypto, card converts at purchase, spend immediately.

**On-Ramp** — Converting fiat to crypto. If buying crypto to load a card, on-ramp fees matter. Coinbase charges ~1.5% for simple buys.

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P

**PAN (Primary Account Number)** — The full 16-digit card number. Never share in screenshots.

**Prepaid Card** — Card funded in advance, not linked to credit line. Many crypto cards are technically prepaid. The issue: prepaid BINs have higher fraud association. BIN classification matters more than "prepaid vs credit" label.

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S

**Settlement** — When funds actually move after authorization. Authorization is "yes, card valid." Settlement is actual transfer, 1-3 days later. Your crypto converted at authorization; settlement matters more for refund timing.

**Spread** — Difference between buy and sell price. If your card's conversion rate is worse than market, they're taking a spread. Some cards advertise "no fees" but take 2-3% spread. Ask about conversion rate vs spot rate. This is where a lot of providers hide their real margin — my opinion? Any card that won't publish their spread upfront isn't worth trusting.

**Stablecoin** — Crypto pegged to stable asset (usually USD). USDT and USDC are the big ones. Stablecoins avoid volatility — load $500 USDT, get ~$500 spending power. Load $500 BTC, and it might be $480 or $520 by Friday. VeloCards supports BTC, ETH, and USDT. If you're holding USDC, you'll need to swap to USDT first — annoying, I know, but that's where we are in 2026. For teams managing multiple [developer workspaces](https://devos.team), stablecoin-funded cards simplify expense tracking.

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T

**3D Secure (3DS)** — Extra authentication layer. "Verified by Visa" or "Mastercard SecureCode" popups. Reduces fraud by verifying cardholder identity. If you're getting 3DS challenges constantly, your BIN might be higher-risk.

**Tier** — Pricing level based on spending volume. VeloCards: Tier 1 ($0-100 annual, $50 card creation, 5% deposit), Tier 2 ($101-$99,999, $30, 4%), Tier 3 ($100K-$499K, $20, 2.5%), Tier 4 ($500K+, $15, 2%).

**Transaction Fee** — Per-purchase charge on top of deposit fees. Can be flat or percentage. Check your provider's documentation.

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V

**Virtual Card** — Card number without physical plastic. Instant issuance, easy to create multiples, instant freeze. Drawback: no in-person purchases without Apple Pay/Google Pay integration. VeloCards is virtual-only — physical cards are planned for future releases but aren't available yet. For online spending, though? Virtual is honestly better. No card number printed anywhere physical that can be photographed or stolen.

**Volatility** — Price fluctuation. BTC and ETH are volatile; USDT is stable. If you load BTC, dollar value at spending might differ from loading. Stablecoins = predictable balance.

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W

**Wallet (Crypto Wallet)** — Where you hold crypto before loading to a card. Self-custodial (you control keys) or custodial (provider holds them). Funding means sending from wallet to issuer's address.

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Troubleshooting Quick Reference

**Declined transaction?** Check: BIN classification, AVS match, spending limits, MCC blocks, 3DS completion.

**Slow funding?** Check: block confirmations, mempool congestion, gas price.

**Higher fees than expected?** Add up: deposit fee, spread, FX fee, transaction fee, monthly fee.

**Works at some merchants, not others?** Almost always BIN classification. For [ad buyers running multiple campaigns](https://clickzprotect.com/blog/real-cost-click-fraud-2026), understanding BINs explains why some cards work at Google Ads and others don't. And if you're running [separate browser profiles](https://justbrowser.app) per ad account, matching each to a distinct virtual card keeps billing organized.

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Frequently Asked Questions

What does BIN mean on a crypto card?

BIN stands for Bank Identification Number — the first 6-8 digits of your card number. It tells merchants which bank issued the card and whether it's debit, credit, or prepaid. Fraud filters use BINs to decide whether to approve or flag transactions.

Why do some crypto cards get declined more than others?

BIN classification is the biggest factor. Prepaid BINs from fintech companies have historically higher fraud rates, so merchant filters treat them with suspicion. Commercial credit BINs from established banks pass filters more easily.

What is an MCC and why should I care?

MCC stands for Merchant Category Code — a four-digit code classifying merchant types. You can block specific MCCs on your card, like gambling (7995), so a stolen card number can't be used at casinos.

What's the difference between an on-ramp and an off-ramp?

An on-ramp converts fiat into crypto. An off-ramp converts crypto back to fiat. Crypto virtual cards skip the off-ramp — you load crypto and spend directly at merchants without selling to fiat first.

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Spend Crypto Online — Without an Off-Ramp

VeloCards is a **virtual card** for spending BTC, ETH, and USDT at any online merchant that accepts Visa or Mastercard. No bank transfer dance, no off-ramp fees, no waiting days for your crypto to clear as fiat. Tier-based pricing — fees drop as your annual spend grows.

**[Open an account →](https://velocards.com/)** · [See the spend tiers](https://velocards.com/#pricing)