PayPal Payment Verification Required

I had some purchases cancelled because of this, the FAQs state that I should receive a 4 digit code in the PayPal email inbox, but I only received the invoice from PayPal that doesn’t include any of the 4 digits code, also, I checked the PayPal account and there’s nothing about the 4 digit code, I don’t want more cancelled purchases, can anyone help me out here? I also tried to email, but before any replay I’ve got the purchases cancelled, thank in advance!