Sage Payment Solutions v. Sage Pay Sage Payment Solutions (now called Paya) is different than Sage Pay (now called Opayo). Make sure you are sure which Sage solution you use if you're familiar with their previous names, and always make sure to test before you assume things are working as expected.
You'll need to determine your Gateway Merchant ID and Gateway Merchant Key, typically sent in an email titled “New Merchant Information”. Please contact Paya's support if you have difficulty determining these values.
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Test credit card numbers listed on the Paya Knowledge Base:
A test value of “123” will work for the Verification Code.
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