Google will retire its Checkout payment processing tool on Nov. 20, and warned retailers they will need to move to a different payment processing platform. Checkout, which launched in 2006, was merged with Wallet, which is a mobile payments tool, last November. The product was aimed at taking on eBay’s PayPal service, which dominates Web-based payments. Google said it has partnered with Braintree, Shopify and Freshbooks to offer discounted options for retailers that have not yet selected an alternative payment processor. Wallet will now be the company’s focus. Developers for its Play store will be moved to the Google Wallet Merchant Center, Justin Lawyer, senior product manager for Google Wallet, wrote. There will be no changes for consumers using Wallet on sites such as Priceline and Uber, according to Lawyer.