# Onboarding The primary method for onboarding new sub-merchants is through our **Referral Signup Link**. Once your platform is eligible, your account manager will provide a unique URL. You should present this link to the clients you wish to onboard as sub-merchants. When your client uses this link, the form will: * [x] Collect all the necessary information to create their merchant account. * [x] Automatically apply all required configurations for them to start processing payments. The form is mobile-responsive and can be embedded directly into your platform using an `iframe` for a seamless user experience. ### Matching Submerchants with your system To easily track and match a new sub-merchant with the corresponding user in your own system, you can add a **query parameter** to the referral URL. Append the **`externalSubMerchantId`** parameter to the end of the URL you received, using your internal identifier for that user. Format: **`&externalSubMerchantId=`**`{YourUniqueSubMerchantID}` Example: If your referral URL is `https://example.pandablue.com/referral?id=XYZ123` and your internal user ID is `user-9876`, the final URL would be: `https://example.pandablue.com/referral?id=XYZ123&`**`externalSubMerchantId=user-9876`** ### Onboarding confirmation After a submerchant successfully completes the signup form, you will receive a webhook Notification confirming that their account has been created.