1
Add items
Add your products to cart and confirm quantities.
Payment guide
How to pay with crypto at checkout.
We accept cryptocurrency payments through checkout. Crypto payments are fast, secure, and usually confirm within minutes.
The key rule is simple: send the exact amount shown and use the correct network for the coin you selected.
Step by step
Crypto checkout in four steps
Customers should be able to scan this quickly, understand the flow, and avoid the two biggest problems: wrong amount and wrong network.
2
Go to checkout
Enter billing details and continue to payment methods.
3
Select crypto
Choose NowCerts (Crypto Payment) under payment methods.
4
Place order
Open the crypto payment screen, choose a coin, and complete payment.
What you’ll see
- Select a cryptocurrency such as BTC or XMR
- Scan the QR code or copy the address and amount
- Send the payment exactly as shown
Important
Before sending
- Send the exact amount displayed
- Use the correct blockchain network
- Crypto transfers cannot be reversed
After payment
- You should receive an order confirmation email
- Your order may show Processing while confirmations complete
- If it does not update, wait a few minutes and refresh
Invoices can expire.
Crypto invoices usually have a limited time window. If the invoice expires before payment is sent, the customer may need to restart checkout.
Customers may also see a pending confirmation message until the network confirms the transfer.
Fees and refunds
Keep expectations clear
- Network fees are paid to the blockchain, not to us
- Underpayments may fail
- Refunds may be store credit or original method depending on the case
The smoothest crypto payments happen when customers follow the invoice exactly.
That means the correct coin, the correct network, the exact amount, and payment sent before the invoice expires.
Quick reference
Rules customers should not miss
A short table often works better than a long wall of text for payment guidance.
| Topic | Rule | Why it matters |
|---|---|---|
| Payment option | Required Choose NowCerts (Crypto Payment) |
Starts the correct invoice flow. |
| Amount | Exact match Send the precise invoice amount |
Helps prevent failed or delayed payment recognition. |
| Network | Required Use the correct blockchain network |
A wrong network can create serious payment issues. |
| Timing | Time sensitive Most invoices expire in 10–30 minutes |
Expired invoices may require restarting checkout. |
Need help paying with crypto?
Contact support with the payment details.
If payment was already sent, include your order number, selected coin and network, any error message, and the transaction hash or ID.
Research compounds provided strictly for laboratory and investigational use. Payment options listed by the site include cards, crypto, ACH/wire, and Zelle.
