If you're collecting a refund or other version of money coming into your account, you may be tempted to enter the amount as a negative. You'll notice that the system won't let you do that.

The correct way to record these in Veryfi is to use a positive number, but mark the document as "Money In". This way, the document will be treated as a credit. You can see the option for "Money In" vs "Money Out" in the top right corner of the document detail view.