There is no way to stop that other than enter the checks in qbo first and the system will match them.
Resolution for 'autopopulating issue: 'How do I remove payee autopopulating name for every check?' available: Yes.
The autopopulating 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 autopopulating issue yourself by looking for a resolution described in the article. If it is a complex autopopulating issue or you are unable to solve the issue, you may contact us by clicking here or by using other autopopulating support options.
For more information about resolving issues related to autopopulating in Quickbooks/QBO or to get support for the issue 'How do I remove payee autopopulating name for every check?', click the link below: