To prepare for the Payment Card Industry (PCI) mandated security upgrade deadline of June 30, 2018, PayPal plans a series of tests to verify that our API endpoints meet the latest security standards. Please see HERE for more details. Please direct any questions HERE
Upcoming Change to PayPal Subscriptions Beginning April 30th, 2018, changes will be made to the way PayPal creates, manages, and displays subscriptions. Click here for an FAQ related to the upcoming changes being made to PayPal subscriptions.
It depends on the merchant. Generally Authorizations can be held for up to 3 days be default, the honor period (can be higher depending on the merchant), once those three days are up the Auth can be captured upto a total of 29 days after the initial Auth, but the money is not held, so no guarantees to the merchant after the honor period.