Why your client may not have received the invoice
The email landed in their spam or junk folder - ask your client to check there first
The email address on the invoice is incorrect or has a typo
Your client's email provider blocked the message due to security filters
The invoice was not actually sent - it may still be in draft or unsent status
What to check in Billdu
Open the invoice and check its status - if it shows "Unsent", it was never sent
Check the document history (Timeline) to confirm the email was sent and when
Verify the client's email address on the invoice - go to the invoice, check the recipient field
If the status shows "Sent" or "Viewed", the message left Billdu successfully
What you can do
Ask your client to check their spam or junk folder
Resend the invoice using the Send button in the invoice
Share the invoice as an online link instead - your client can open and pay it directly without email
Send the invoice as a PDF via WhatsApp, SMS, or any other messaging app
Update the client's email address in the Clients section, then resend
How Billdu sends emails
Mobile app - invoices are sent from your own mail app (Gmail, iOS Mail, etc.)
Website - invoices are sent from invoices@mail.billdu.com with your business name displayed in front; replies go to your account email
If you use the mobile app and your mail app is not set up correctly, emails may fail to send. Go to Settings - Client communication - Email settings to switch to Billdu's mail server instead.
Tip: To avoid delivery issues in the future, you can enable "Attach document as PDF" in Settings - Client communication - Email settings. This ensures the PDF is included directly in the email.
Didn't find what you were looking for? Contact our support team, and we'll sort it out for you.