Hello Community Users! We can see that the invoices/invoice reminders not being received is less than ideal. This is a known issue our engineers are at present working to resolve. It is the highest priority for us. If you do experience this issue let us know and we'll make sure you're added to the investigation for those affected and contact you as soon as this is resolved. 

In the meantime, while the issue is being worked on by our engineering team please continue to use the below options, as a workaround: 

• You can save your form as a PDF and send it via email through your business or other email address
• (For invoices or estimates only) You can send your customer a link to their invoice or estimate through SMS or messenger service. Simply click on “save and share link” then select “copy link” and paste it into your SMS or messenger service.
• If you have a Gmail or G-suite email account, you can use the Send with Gmail feature to send QBO forms from your own address following the steps in Use your Gmail address to send invoices (https://quickbooks.intuit.com/learn-support/en-uk/help-article/invoicing/use-gmail-address-send-invo...).
• You can save your document as a PDF, print it, and send your customer their forms via mail

or

• Customers -> select Invoices -> batch actions -> Print -> Save as PDF -> email from onw email service
• Statement of open invoice -> Open Invoices report -> Print -> Save as PDF -> email from own email service