QB Issue Resolution:

At this time, the option to sign and stamp in an invoice’s footer is unavailable. You can only enter a text in the Add footer text section when customizing the standard template.

However, you can import an invoice template that contains the data you need using an MS Word .doc file directly into QuickBooks Online. You can check out this article for the steps and details: https://community.intuit.com/articles/1145368.

Resolution for Issue 'can i sign and stamp on the footer of an invoice just the way company logo is uploaded?' available: Yes (Solved).
Source: Intuit Community forum.

can i sign and stamp on the footer of an invoice just the way company logo is uploaded?: 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 Company Logo
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