Secure-US merchant identifier in link creation payload

When you create a Secure-US link, you can include the merchant identifier in the creation payload. Shared integrations no longer have to infer the merchant from caller context alone, which reduces the risk of sending customers to the wrong account or business process.

• Pass the merchant identifier in the link creation payload when caller context does not match the customer you are serving.
• Customer links honor the merchant you specify, so payments and business processes stay under the correct account.
• One integration can create links for multiple merchants without mixing accounts across customers.