Method to send a PayPal invoice is as follows –
Step 1. Go to paypal.com and login to your account by clicking the Login option found at the top right corner of the page.
Step 2. Further, select the Send & Request option. Check the image below:
HOW TO SEND PAYPAL INVOICE
Step 3. On that page tap on the Create Invoice button. As shown in the image below:
HOW TO SEND PAYPAL INVOICE
Step 4. After that, you have to click on the Create New Invoice option as marked in the above image.
Step 5. It will take you to the Create Invoice page where you can make your invoice.
Step 6. From there you go to the Bill to segment form in which you need to enter the customer’s email address. As shown in the image below:
HOW TO SEND PAYPAL INVOICE
Step 7. Later, below the Customize title, you can insert the details of your billable setting.
Step 8. You can include as many products as needed by you there.
Step 9.  The Preview button enables you to view what your invoice will seem like before you select the PayPal invoice to send option.
HOW TO SEND PAYPAL INVOICE
Step 10. Additional tip: Also, if you regularly bill for this particular item you can save this invoice as a draft to use it in the future instantly.
Step 11. When done, transfer the PayPal invoice by clicking on the Save button at the bottom.
Step 12. Lastly, PayPal will alert your customer through about the invoice through email.