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Paying with crypto.

You do not have to understand a blockchain to use this. You need an account at one exchange, roughly five minutes the first time, and the patience to copy two things exactly: the address and the amount.

The short version.

Buy a stablecoin — USDT or USDC, each pegged to one US dollar — at any exchange. Pick that token at our checkout, place the order, and an address, a QR code and an exact amount appear. Send it. The order moves itself on, usually within minutes, and the confirmation email goes out on its own.

Nothing touches a card, nothing about you is stored, and no third-party payment script loads anywhere on this site.

Three steps, end to end.

  1. Buy the tokenUSDT or USDC at any exchange, paid by bank transfer or card.
  2. Send the exact figureScan the QR or copy the address, on the network you selected.
  3. It confirms itselfWe see the payment land and the order advances. No message required.
The payment step at checkout: bank transfer or crypto, then the token and the network. That is the only decision on our side.
The payment step at checkout: bank transfer or crypto, then the token and the network. That is the only decision on our side.

What a stablecoin is, in one paragraph.

USDT (Tether) and USDC (Circle) are tokens built to hold one US dollar of value. They do not swing the way bitcoin does — that is the entire point of them, and why we price in euro and convert only at the moment the invoice is written.

So the figure we ask for is fixed and will not move while you pay. If the invoice runs out before you send, make a new one.

Picking a network.

The same token lives on several networks and they are not interchangeable. Take whichever your exchange sends most cheaply — then use that same one when you withdraw.

Polygon — the defaultCents to send, confirmed in seconds, carries both USDT and USDC. With no reason to choose otherwise, choose this.
Tron — the usual USDT roadCheap and quick, and the network most exchanges default to for USDT. We take USDT here.
Ethereum — only if you are already thereThe identical transfer can cost several euro in network fees, sometimes considerably more. It works; it is the expensive door.

The one rule: the network you choose at our checkout and the network on your withdrawal screen have to be the same word. USDT sent over Tron to a Polygon address is not late — it is gone.

Your first time, step by step.

  1. Open an account at a large exchange — Kraken, Binance, Coinbase and Bitvavo all serve the EU. Identity checks run from minutes to a day, so do this part before you need it.
  2. Fund it. SEPA is the cheap road and usually lands the next working day; a card is instant and normally costs a few percent more.
  3. Buy USDT or USDC for the order total, plus a euro or two to cover the network fee.
  4. Come back, choose Crypto at checkout, pick your token and network, and place the order. Address, QR and exact amount appear at once — and again in your email, so you can finish it on a phone.
  5. On the exchange choose Withdraw, paste our address, select the same network, and type the amount exactly as shown — every decimal of it.
  6. Send. Polygon and Tron normally settle inside a minute. When it lands the order flips to confirmed on its own and the email goes out.

That is the whole thing. The second time takes about ninety seconds.

The order summary while you pay: goods, the single flat fulfillment fee, and the total the invoice is written against.
The order summary while you pay: goods, the single flat fulfillment fee, and the total the invoice is written against.

The five mistakes people actually make.

  1. Wrong network. The costliest mistake in crypto and the easiest to avoid — read the network twice before you press send.
  2. Rounding the amount. Matching is by the exact figure to the final decimal. A rounded number sits there waiting for a human.
  3. Letting the invoice lapse. It holds for two hours. After that ask for a fresh one instead of sending to an old address.
  4. Sending the other token. USDT and USDC are not the same thing — send what you selected.
  5. Paying from a service that hides the network. Some brokers and apps will not let you pick one. If you cannot see the network, use an exchange that shows it.

What it costs.

We add nothing for paying in crypto. The only extra is your exchange's network fee to send — cents on Polygon and Tron, materially more on Ethereum.

Send the exact invoice figure and let the exchange add its fee on top. If it insists on taking the fee out of the amount, raise the number so what arrives is what the invoice asked for.

What we can and cannot see.

Our payment system only watches for an amount arriving at an address. It never touches your wallet, never asks for a key or a seed phrase, and nobody at PRIMALFORM will ever ask you for one.

No card data exists here because no cards are taken, and nothing from a payment provider loads in your browser.

Refunds return to the wallet that paid, same token, same network, as the number of tokens received rather than their euro value on the day.

If it goes wrong.

Write with your order number and the transaction hash from your exchange. A payment that arrived late, short, or against a lapsed invoice gets matched by hand — an annoyance, not a loss. A payment sent on the wrong network is the single case nobody can undo, which is why it heads the list above.

Rather not?

Then don't. Bank transfer is the other rail: account details and your reference appear the moment you order and again in the email, and we pack as soon as the money lands. Crypto is faster; a transfer is ordinary. FAQ · Shipping & delivery

What we get asked.

Do I need a wallet app?

No. Paying straight from an exchange account is fine and is what most people do. A wallet earns its keep if you hold crypto regularly, not for one order.

How long does it take?

On Polygon and Tron, usually well under a minute after you press send. Ethereum can drag when the network is busy. Once it lands the order confirms itself — you do not have to tell us.

What if I send a bit too much or too little?

Too much and we refund the difference or credit it, your call. Too little and the invoice stays open — send us the transaction hash and we straighten it out.

Is crypto anonymous?

No, and we will not pretend otherwise. Exchanges verify identity and blockchains are public. What is true is that no card details exist and no payment processor sits between us.

Can I pay in bitcoin or ether?

Not today. USDT and USDC only, because an invoice has to hold its value for the two hours it stays open.

Crypto is not showing at checkout.

Two reasons it hides: something in the basket has no list price yet so the total is not final, or our payment watcher is briefly down. Bank transfer still works and the option comes back by itself.

Better reading elsewhere.

We have no affiliation with any exchange and earn nothing from these links. Their help centres explain buying and withdrawing far better than a shop can, and the issuers publish what backs each token.

Whenever you are ready: fill the basket, choose Crypto at checkout, and the address and the exact figure appear on the spot. One flat €20.00 fulfillment & delivery fee per order, whatever its size.

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Last updated 24 August 2026

⚠ Everything we supply is for in-vitro laboratory research. Not for human or veterinary use. Nothing on this page is financial advice — it describes how to pay us.