Sounds like a possible scam link, but ultimately, you most likely WILL be required to register for managed payments, and you will need to upload either a copy of a passport or drivers licence. If you don't register as requested, your ability to sell on here will be finished, as this is the new way of doing business on Ebay.

Does your Seller Hub not show a formal inviation to register with a deadline requirement? If it's not rolled out for you yet, it will be sooner or later.