Our sandbox environment at https://v3-sandbox.justgiving.com and https://dataapi-sandbox.justgiving.com is there for testing.
In the majority of cases, we will ask that you log into this environment as our Demo Charity Account (charity ID = 2050). That way we can be sure that there is sufficient historical data already present to aid your tests. We do not store payment data for other charities as that is expensive to maintain.
If you need to generate a particular payment report we will do that on a case by case basis when requested by email.
We ask that all donation and fundraising data be generated by you on the sandbox environment. Details on our test cards for doing this can be found here