Payment Plugin: TouchNet uPay

The "Require encoded validation key for amount?" field on the uPay Payment Settings page must be set to Yes.

You must enter a "Passed Amount Validation Key" value on the uPay Payment Settings page. And the same value for validation key in amember.

You must configure your uPay site to use a posting URL: https://example.com/amember/payment/touchnet-upay/ipn

You must enter an "Additional Posting Value" on the uPay Miscellaneous Settings page. And the same value for posting key in amember. aMember rejects all postings while it is empty.