You could print the check on plain paper to get a copy of the check stub. There isn’t a provision for printing just the stub of a regular check in QuickBooks Online.

To find the check to print:

Type Check in the Go to Report search field at the top left of […]

Resolution for 'Check Stub issue: 'Can I reprint off a stub of an old check?' available: Yes.

The Check Stub 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 Check Stub issue yourself by looking for a resolution described in the article. If it is a complex Check Stub issue or you are unable to solve the issue, you may contact us by clicking here or by using other Check Stub support options.

For more information about resolving issues related to Check Stub in Quickbooks/QBO or to get support for the issue 'Can I reprint off a stub of an old check?', click the link below: