Making more money is always awesome right?! Well, you can with the gratuity option in Dubsado.
Click on the Gear icon at the top of the account and head to the Receive Money tab By default it is off.
By selecting a category, it will allow the tips to be automatically categorized for bookkeeping purposes.
You can use this with any processor and toggle it on or off globally. If turned on globally, tipping can be turned on or off per job, but not for different invoices within the same job.
Then, when the client goes to pay that invoice, if enabled, they are given the option to tip :)