My transactions are posting to my designated URL and I can access the
Request.Form values. My question is how do I know this really came from
AuthorizeNet? I want to do some processing based on a successful Payment
Form transaction. Thanks
There is a warning at the bottom of page 29 in the SIM_guide.pdf. It
states that the merchant’s “transaction key” should be “stored securely
and separately from the merchant’s web server”. I don’t understand how
this is possible since the sample code...
