It's the email address you use to login to your PayPal Account.
But, beware of scammers!!!!!
One of the most common red flags is that the buyer wants to sent you the money via your PayPal email address. Normally as the seller, you send the buyer an email invoice or the purchase is processed through your web page or site. Also, if plan to be a seller, you should have either a Premier or Business Account. You will run into limitations trying to use a Personal Account.
Next common red flag, the buyer wants the item delivered to another country and recommends a specific shipping service for you to use
Another red flag, buyer offers to pay more than you're asking or is requesting shipment ASAP to an unconfirmed address or another state or country.
Beware when the seller wants you to send him the money for a purchase but you are asked to send the money as a "Gift".
This means that the seller is trying to avoid paying the transaction fees and also makes it hard for you to prove you actually purchased an item.
You can protect yourself in several ways:
Do not sell to non-US PayPal Accounts.
Require a "Confirmed Address" meaning that the shipping and billing address must be the same.
Opt to not accept eChecks.
Block payments from Student account users under 18 years old.
These are all options you can enable from within your PayPal Account Profile.
Regards,
skier
