Yes. You can add the customer’s signature later by editing the Service Report (if it is in the Draft state).

• Open the Service Report
• Click Edit
  
  
  
  
• In the signature section, click Add Signature
  
• In the Edit Service Report window, go to the Customer Signature section and click Add Signature
  
  
  
  
• In the Add Signature window, click the attachment icon
  
  
  
  
• Upload the customer’s signature and click Save
  
  
  
  
• Click Save and Update
  
  

With this, you can capture and include the customer’s signature even if it was not collected during the initial report creation.