I've integrated Paypal into our web site payment process and got it working to the point where I can process payment using my sandbox API credentials. I don't receive any errors and everything appears to have been processed correctly, but when I check the account balance in the Paypal sandbox the transaction does not appear.
I am using the correct login details and API credentials, so can't understand why nothing is displaying in the sandbox.
Any ideas?
I conclude that there are two ways of constructing a software design: One way is to make it so simple there are obviously no deficiencies, and the other way is to make it so complicated that there are no obvious deficiencies." - Tony Hoare