What is the Receipt Policy Limit used for?  If we set the limit at $1,000, does that mean anything under would NOT require a receipt? 



If the receipt policy is enabled then by default, if your expense does not have a receipt, you have to enter comments/receipt. If the receipt policy is enabled for say $1000, and the expense amount is less than $1000 then the users will not have to enter comments/attach receipt. If the expense is above $1000 then comments/receipt is required. 


Please refer to below screen shot to know how you can enable the receipt policy using the masters expense type



This will be visible to the users when they exceed the policy limit.