Saw this in ACA tonight.
From what I can work out... You do a quote, if the customer accepts the quote they put the money into "check vault." Once the job is complete and the customer is satisfied the money is released to you.
I don't see this working very well for regular mowing (small stuff anyway) but garden clean ups, one off jobs, landscaping etc I think it could be great!
Have a look anyway...
https://www.checkvault.com.au