# Payment Gateway Registration Guide (USA Market)

Follow these steps to set up your payment infrastructure. Use your **US LLC** details and **EIN**.

## 1. Airwallex (Recommended Primary)
Airwallex is the most flexible for non-residents with a US LLC.

### Steps:
1.  **Visit**: [Airwallex Signup](https://www.airwallex.com/)
2.  **Entity Type**: Choose **United States LLC**.
3.  **Personal Identification**: Provide your **Argentinian Passport**.
4.  **Business Proof**: Upload your **EIN Confirmation** (CP575) and **Operating Agreement**.
5.  **Bank Link**: Connect your Mercury/Relay account if you have one.
6.  **Friction Setting**: Once approved, go to **Settings > Payments** and ensure **3D Secure** is set to "Disabled" or "Optional" for US transactions.

## 2. Stripe / Shopify Payments
Standard for high conversion, but stricter with ITIN.

### Steps:
1.  **Visit**: [Stripe](https://stripe.com/)
2.  **Legal Entity**: Choose **Company -> LLC**.
3.  **Tax ID**: Enter your **EIN**.
4.  **Representative**: If you don't have an ITIN/SSN, select "No" when asked for US tax residency and provide your passport number. *Note: They may freeze funds if you don't provide an ITIN later.*
5.  **Integration**: Use the **Stripe App** in Shopify.

## 3. dLocal Go (Backup / Global)
Very simple setup, great for cross-border.

### Steps:
1.  **Visit**: [dLocal Go](https://dlocalgo.com/)
2.  **KYC**: Use your **DNI or Passport**.
3.  **Business**: You can register as an individual or your US LLC.
4.  **Payouts**: Configure to send money to your bank in Argentina or via Payoneer.

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> [!TIP]
> **Avoid VPNs** during registration. Use your real IP or a high-quality residential proxy. If the platform detects a datacenter VPN, they will flag your account immediately.