Adding your purchase invoice is easy - simply snap a photo of your invoice using the in-app camera at the bottom of the home screen.
To avoid any delay to your invoice being verified, make sure your photo shows the entire invoice and the invoice details are clear and easy to read.
Your invoice will normally be verified within a few hours, but this can take longer during busy periods so make sure to add them as soon as you can (it's so simple, you can do it on-the-go!).