QB Issue Resolution:

I replicated the issue using different check formats such as voucher, standard and wallet. None of any of the checks I printed have that message. Normally, a standard message can only be set up to customer transactions such as invoices and sales receipts. It would be best to check if it’s a signature or a logo that is attached to the check print out.

Resolution for Issue 'Still looking for way to delete the standard message' available: Yes (Solved).
Source: Intuit Community forum.

Still looking for way to delete the standard message: this 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 issue yourself by looking for a resolution described below. If it is a complex issue or you are unable to solve the issue, you may contact us by clicking here or by using other support options.

Support for Quickbooks
Quickbooks Repair Pro will resolve it efficiently and affordably. Guaranteed resolution of your issue, or you pay nothing!

Error Recovery for Quickbooks [Canada]
E-Tech is the #1 Quickbooks data migration and Conversion service provider.

Get 50% off Quickbooks Online

Click Here for 50% off!

Additional Support Options: