@Reesha2
1. The email address you use with Paypal identifies your Paypal account and is all someone needs to pay you.
2. Your phone number identifies your Paypal account if using the app.
3. If you have set up a paypal.me link you can send that but make sure the buyer ticks the goods/services option to pay (if the f/f option is available in your country).
4. You can send a money request/invoice from your Paypal account to their Paypal email address for them to pay.
Advice is voluntary.
Kudos / Solution appreciated.
