Enable validation mode details

-- HikaShop version -- : 4.0.1
-- Joomla version -- : 3.9.1
-- PHP version -- : 7.0.2
-- Browser(s) name and version -- : CHROME
-- Error-message(debug-mod must be tuned on) -- : Enable validation mode

Hello,

I just would like some details on "Enable validation mode (Classical only)", I use it in the Paypaladaptive plugin (PAYPAL_CLASSICAL: Yes).

In your support, I didn't find more doc than:
"Enable authorization mode : If activated, the payments won't be processed by PayPal but put "on hold", waiting for you to validate them manually."

I use it with Hikamarket.
1. Does the vendor have to manually validate the payment (I would prefer) or the website?
2. Does the vendor or the website receive an email (System> E-mail> is it the Market: Order status notification) ?
3. Any faster way to validate the payment than going in Order and changing the status ? Or is it in Paypal ?

Thank you,
Best,