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Can PayPal transfer money automatically from my bank account if I link it in PayPal?
I linked my bank account (by making a transfer from bank account to Paypal) without linking a card. This should not give Paypal any rights to do anything with my bank account - transfer that I made to link it was exactly the same as any other outgoing transfer from my bank account. On attempting to pay more that resides in my Paypal balance I get  To pay for this purchase right now, link a debit or credit card to your PayPal account. message. Paypal is not mentioning it but one may also transfer money to Paypal account form bank to solve this problem. Note, that one may give allow Paypal to access bank account - maybe linking a card will allow this? Paypal encourages linking card but without any description of consequences so I never checked this. It is also possible that Paypal gained access to your bank balance in other way - for example in Poland it just asked for logins and passwords to bank accounts (yes, using "Add money instantly using Trustly" in Poland really requires sharing full login credentials to bank account - what among other things breaks typical bank contract) source for "Paypal attempts phishing": https://niebezpiecznik.pl/post/uwaga-uzytkownicy-paypala-nie-korzystajcie-z-najnowszej-funkcji-tego-serwisu/