How Private Prepaid Cards Work
Learn how private virtual prepaid cards separate funding from spending, what issuers and merchants can still see, and how Senddy converts private USDC into card credentials.
A private prepaid card separates two events that are usually combined: funding money and spending at a merchant. The merchant receives an ordinary card payment, while the card is funded through a separate balance rather than your everyday bank card.
With Senddy, that funding balance is private USDC. The result is stronger separation from both a primary bank statement and a publicly linked crypto wallet.
The Senddy card flow
1. A user selects $5–$1,000 from a private Senddy balance.
2. A zero-knowledge withdrawal funds a one-time Base payer address.
3. That address uses USDC to purchase a fixed-balance virtual prepaid card.
4. The user receives the card number, expiration date, CVV, and billing address for online checkout.
5. The merchant processes a normal card authorization.
Who can see what?
Public blockchain observers
They can see the one-time payer address purchase a card, but they do not receive a simple public link to the user’s shielded Senddy balance, private transfer history, or normal wallet.
Senddy
Senddy associates safe card metadata with the account so the user can reopen or recover cards. Full card credentials are not stored in the Senddy card metadata database.
Card provider and issuer
They process issuance, authorization, merchant activity, fraud controls, and program restrictions. Private funding does not hide a card payment from the parties operating the card.
Merchant
The merchant sees a normal virtual-card payment and the information needed for authorization, billing, and service delivery.
Primary bank or credit-card issuer
They do not receive the merchant charge when the purchase is funded entirely through private USDC and the Senddy Prepaid Card.
Statement privacy vs payment anonymity
Statement privacy means separating a merchant charge from a primary statement viewed by a household, employer, or other account holder. Payment anonymity would imply that no participant can connect the payment to a person. Card payments generally provide the first—not the second.
Non-reloadable cards and recurring billing
A non-reloadable card has one fixed balance. This reduces ongoing exposure and makes budgeting simple, but it is less convenient for subscriptions. When the balance is depleted, create a new card and update the merchant billing details if the transaction remains supported.
Good use cases
Private prepaid cards are useful for supported online purchases where you want to protect a primary card number, separate a merchant from a shared statement, budget a fixed amount, or spend private USDC through familiar checkout.
Limits
They do not hide browser history, email receipts, merchant accounts, delivery addresses, card-program records, or illegal activity. Acceptance, geography, refunds, recurring behavior, and program policy can change.
Read No-KYC Virtual Cards: What “No ID Upload” Really Means, visit Senddy Prepaid Card, or see the platform-specific OnlyFans privacy guide.