Generally, your client has multiple ways of accessing your invoice:
If your client is registered at Request, they'll get notified and see your invoice in the "Bills" menu
If you shared the invoice manually, then they'll directly see the payment page by clicking on the link you shared
If your client isn't registered at Request and you created your invoice without being asked to share it manually, then they'll receive an automated email notification
Automated email notification
When you create an invoice via Request Finance, your invoice is automatically shared with your client via an email notification as below.
It includes a link to the payment page:
It also includes details about the bill:
Payment page with the option to sign up
Clicking on the link in the email will show clients who aren't registered at Request this page:
Payment page
Following the "Pay as a Guest" option (above) or sharing the link manually will show this page, from where clients can pay your invoices with their wallet.
Once your client pays, you will receive an automated email notification from Request. You can also follow the status of your invoice via the "Invoices" menu.