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Terms and conditions for Payment gateway

Terms of usage or terms & conditions

Should cover detail on business model that includes details about what is service or product, delivery time lines, refunds, cancellation policies
Note: Clearer information is better (refer some mature company websites)

Cancellation / Refund Policy

Either separate tab on refund or cancellation policies or combined with Terms of usage
Note: Essential to have these policies

Privacy Policy

Privacy policies that are implemented by merchant to capture, safeguard and use customer’s information. (either separate tab or under terms of usage)