You will need to contact First Data directly to apply for your First Data Global Gateway account here https://www.firstdata.com/en_us/connect

After you have your Global Gateway account setup, you will need to download and install a certificate file.

1. Login to the First Data admin and navigate to Support → Download Center → Download Now.
2. Type in your Tax ID and hit the Download button
3. You will download a certificate file with your store number and ending with .pem
4. Upload the pem file certificate in the gateway section of the smith cart settings where it says upload pem file
5. Setup SSL in your portal to protect the credit card information sent across the web

Note: Connecting to First Data Global Connect gateway requires connecting over port 1129 bi derectionally so make sure this port is open and not blocked by your firewall.

6. In Smith Cart, Select the payment gateway option from the dropdown labeled First Data Global Gateway.
7. Enter your 10-digit store number provided when your First Data account was setup.
8. Enable test mode if you are using a test account
9. At the bottom of your Smith Cart settings click update to save your changes.

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At your service,
Dave Smith