If i use my PayPal debit card at an atm and i dont have enough money in my PayPal account to withdraw the said amount will it use my linked debit card to withdraw the rest?
With ATMs in Australia (and, I presume, across the world), you need to pick a specific account to withdraw from. This also allows you to check the balance of that account.
So if you don’t have enough in one account, the system should not automatically deduct the balance from another account on the basis of the ATM withdrawal ‘request’.
for ‘travel’ cards with multiple currencies loaded, you may be able to arrange for an automatic conversion from a different ‘wallet’ within that account to the currency withdrawn; and
if you have an overdraft arrangement in place, you may be able to draw on that credit, with repayment by agreement from a different account.
Neither of these is an automatic ‘top-up’ withdrawal from an account you didn’t choose at the ATM.
According to PayPal page on PayPal Cash Card, Direct Deposit, and Cash Load:
Declined transactions and overdraft fees
All Fees Amount Details Spending declines due $0 We will only authorize purchases to insufficient funds when you have sufficient funds in your balance. ATM withdrawal declines $0 We will only authorize ATM withdrawals due to insufficient funds when you have sufficient funds in your balance.