Paypal payment delayed up to 3 business days, why does Paypal consider payments to be risky or fraudulent?

Question

PayPal

I set up one-time payments via Paypal in the online store according to the article on Habré
. There are 2 accounts sandbox buyer and facilitator.
Payment is made in rubles.
The facilitator account has a ruble wallet.
When the payment arrives on the facilitator account, the payment status is "Pending"
And the signature "We're taking a closer look at this payment. It's required for some payments and normally takes up to 3 business days. Don't ship until we tell you it's ok ."
The following information is written on Paypal itself: "PayPal reviews all transactions to help sellers avoid risk. If we believe a payment may be risky or fraudulent, we will review it and ask you to wait until our review is completed before submitting. The review process is usually takes less than 24 hours, but can sometimes last up to 48 hours."
Please tell me how to make paypal understand or how to set up payments so that he does not consider them risky or fraudulent?