How to Enable Credit Card Payments for Peptide Sales: A Merchant's Guide

Why Standard Credit Card Processing Does Not Work for Peptides

Peptide merchants who try to use standard payment processors face account freezes, fund holds, and terminations. Stripe, Square, and PayPal classify peptides as restricted products and will shut down your account — often without warning and sometimes with funds held for 90-180 days. Even if you manage to process a few transactions before detection, the risk of losing access to your money is not worth it.

The solution is a dedicated high-risk merchant account paired with a payment gateway configured specifically for peptide sales. This guide covers the practical steps to get from "no payment processing" to "accepting credit cards reliably."

Step 1: Get Approved for a Peptide Merchant Account

Before you can accept credit cards, you need a merchant account from a processor that explicitly supports peptide businesses. This is a distinct step from gateway integration — the merchant account is your banking relationship, and the gateway is the technology that connects your website to that banking relationship.

Approval requirements:

• Compliant website with no health claims, proper disclaimers, and published policies
• Business documentation (formation docs, EIN, bank statements)
• Product COAs from third-party labs
• Processing history if available

The approval process typically takes 5-10 business days with Unison. See our detailed peptide merchant account requirements guide for the full documentation checklist.

Step 2: Choose Your Payment Gateway

Your payment gateway handles the technical side of accepting credit cards — securely capturing card data, transmitting it for authorization, and returning the result to your checkout page.

Gateway options for peptide merchants:

Unison pairs your merchant account with the gateway that best fits your platform and business model. Most peptide merchants use NMI or Authorize.net, which offer pre-built plugins for major eCommerce platforms and robust APIs for custom builds.

Step 3: Integrate With Your eCommerce Platform

WooCommerce

WooCommerce offers the most flexibility for peptide sellers because it places no product category restrictions on your store. Integration steps:

1. Install the gateway plugin (NMI or Authorize.net) from the WordPress plugin repository 2. Enter your gateway credentials (provided after merchant account approval) 3. Configure checkout settings — hosted payment page or embedded form 4. Enable tokenization for returning customer convenience 5. Set up subscription billing if you offer auto-ship programs

Shopify

Shopify Payments prohibits peptides, but you can use Shopify as your storefront with a third-party payment gateway:

1. In Shopify admin, go to Settings → Payments → Third-party payment providers 2. Select your gateway (Authorize.net is directly supported; NMI via Shopify integration partner) 3. Enter gateway credentials 4. Test checkout flow with a test transaction

Note: Shopify charges an additional 0.5-2% transaction fee when using a third-party payment provider. Factor this into your pricing.

BigCommerce

BigCommerce supports third-party gateways without additional transaction fees:

1. Navigate to Store Setup → Payments 2. Select your gateway provider 3. Enter credentials and configure settings 4. Test end-to-end checkout

Custom platforms

For custom-built peptide eCommerce sites, use the gateway's RESTful API for direct integration. Documentation and sandbox environments are provided for development and testing.

Step 4: Optimize Checkout for Conversions

Peptide customers are more likely to abandon checkout than standard retail buyers. The high-risk nature of the category, combined with less-familiar payment flows (non-Stripe, non-PayPal checkout), means your checkout experience needs to work harder to convert.

Checkout optimization for peptide stores:

• Trust signals at checkout — display security badges, SSL indicators, and "secure checkout" messaging prominently
• Minimal form fields — only collect information you need. Every extra field reduces conversion
• Digital wallet support — Apple Pay, Google Pay, and similar options provide familiar, trusted payment methods that increase conversion
• Guest checkout — do not require account creation to complete a purchase
• Saved payment methods — tokenization allows returning customers to check out with saved cards, dramatically improving repeat purchase conversion
• Clear billing descriptor — configure your billing descriptor so customers recognize the charge (e.g., "PEPTIDEBRAND.COM" not "MERCHANT SERVICES LLC")

Step 5: Enable Subscription and Recurring Billing

Many peptide businesses offer subscription programs or auto-ship options. Recurring billing requires specific setup:

• Tokenized card storage — securely stores payment methods for future charges without exposing card data
• Dunning management — automated retry logic for failed payments (retry 3 times over 7 days before canceling)
• Pre-charge notifications — email customers 3-5 days before each charge with a one-click cancel option (this is both a best practice and a chargeback prevention measure)
• Easy cancellation — if customers cannot easily cancel, they will dispute the charge instead

For detailed recurring billing setup, see our guide on peptide subscription and recurring billing.

Step 6: Activate Fraud Prevention

Peptide businesses are frequent targets for card testing (fraudsters using your checkout to test stolen card numbers). Without fraud prevention, a single card testing attack can generate dozens of chargebacks.

Fraud prevention stack for peptide merchants:

1. AVS (Address Verification) — match billing address to card-on-file address 2. CVV verification — require the 3-digit security code for every transaction 3. Velocity controls — limit the number of transactions per card, IP address, or email within a time window 4. Device fingerprinting — identify and block suspicious devices 5. 3D Secure — add an authentication layer for higher-risk transactions 6. Manual review rules — flag orders over a threshold amount, from high-risk countries, or with mismatched shipping/billing addresses

See our peptide fraud prevention stack guide for detailed configuration recommendations.

What It Costs

Credit card processing costs for peptide merchants include:

• Processing rate: 3.5-5.5% + $0.15-$0.30 per transaction (interchange-plus)
• Gateway fee: $0-$25/month depending on provider
• Chargeback prevention: $25-$50/month for Ethoca/Verifi alerts
• PCI compliance: Included with hosted payment pages; self-assessment if embedded

There are no monthly fees, setup fees, or early termination fees with Unison. You pay only for the transactions you process plus the transparent interchange-plus markup.

Apply for peptide payment processing → or call (925) 290-6003 for a custom rate quote based on your volume and business profile.