To request a new receipt for any Leanpub purchase you've made, please sign to in to Leanpub and go to your 'Purchases' page here:
Next to the purchase, click "Request a Custom Receipt".
Then, click "Send Your Receipt".
If you need to sign in to Leanpub, you can do that here:
If you need to set a new password to sign in to Leanpub, you can do that here:
If you are not receiving emails from Leanpub, you may want to add email@example.com to your Contacts list.
Here are instructions for adding custom information, like a company name and address, to your purchase receipt/invoice: