Your Paypal account needs to be a verified account in order for you to collect funds. Essentially you need to add a credit/ debit card or a bank account to your Paypal account to verify your identity with them.The first thing to check is that the first name, last name and email address that you provided when you entered your details on Shareagift matches exactly to your PayPal account details.
Secondly check if there are any pending email verification messages from PayPal in your inbox.
Thirdly check that your credit or bank account has been validated with PayPal and that there are no pending validations.
For additional help please see the following FAQ for PayPal
How do I add/remove a debit credit card from my PayPal account?
What if I don't confirm my debit or credit card?
How do I edit or verify my card?
How do I verify my PayPal account?
If you are still experiencing issues verifying your account then please give PayPal a ring on (UK) 0800 358 7911 (Anywhere else) 00353 1 436 9004.