try the fix from this other support ?: https://community.intuit.com/questions/1029478-why-are-the-borders-missing-when-i-save-as-a-pdf
Resolution for 'borders issue: 'Borders do not show up on emailed invoices. I would like them to show.' available: Yes.
The borders issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the borders issue yourself by looking for a resolution described in the article. If it is a complex borders issue or you are unable to solve the issue, you may contact us by clicking here or by using other borders support options.
For more information about resolving issues related to borders in Quickbooks/QBO or to get support for the issue 'Borders do not show up on emailed invoices. I would like them to show.', click the link below: