Once an engineer has 'arrived' at a property, tap into the job.
They will have an 'options' button in the top right corner of the iPhone.
Tap options and you should see 'New Certificate'. If you don't see this option there are two reasons:
1. You don't have the certificate module turned on. In this case ring CommuSoft support and ask them to switch on this module, note there maybe a cost associated with this, please ask the support team for information.
2. If you do have the certificate module turned on, please contact support at support.commusoft.co.uk