PayPal Community

I am working on a custom payment system for my blog (PHP), and now I am trying to implement the IPN system.   I have fully copied the PayPal php example, but no matter what I do, I always get an INVALID response when validating the IPN request.   I have read tons of other topics explaining the same problem and still can't find a solution.   - I am using the OFFICIAL code example - I am using the sandbox IPN address - I have tried with and without setting a value in 'payment_date' , because many others suggested that the problem is in the plus sign inside the date. - Tried with and without https:// at my end - I have tested the code on 2 different servers, from 2 different PayPal developer accounts.   And each and every time the response of the validation is INVALID. I am almost ready to give up...   Thanks in advance! ... View more

Hello, does anyone else experience an increase in payments that are under review? For last few hours my client received 6 payments and 4 of them are now "Transaction # under PayPal Payment Review". I didn't change any code on the payment application, so it should be on PayPal dev side.   I found this question from today in stackexchange, where another site owner is having nearly 10% of its payments under review: https://webmasters.stackexchange.com/questions/108082/sudden-increase-in-paypal-payment-review     ... View more