If Basic Tip Processing is enabled on the terminal, the customer is prompted as shown below on Purchase, Pre-Authorization Completion and Advice transactions.
1. "Tip: $0.00" appears on the terminal.
2.      The 
 customer (or in some cases you) keys in a tip amount to add to the transaction 
 and presses the green 
 
 key to continue the transaction with the tip added.
OR
The customer presses the green 
 
 key without keying in a tip amount and the transaction 
 continues with no tip added.
Note: Tip Processing is skipped on Signatureless Transactions.
IMPORTANT: Basic Tip Processing must be enabled in order for Enhanced Tip Processing to work.
To configure Tip Processing, see Configuring Tip Processing.
If Enhanced Tip Processing is enabled on the terminal, the customer is prompted as shown below on Purchase transactions.
Note: On Pre-Authorizations and Pre-Authorization Completions, Enhanced Tip Processing works the same way as Basic Tip Processing.
1. "Tip Type:" appears on the terminal.
2. The customer selects one of the following options:
● The customer selects %.
●        If 
 up to three configured 
 suggested percentages appear with an Other 
 selection, the customer selects the desired tip percentage OR selects 
 Other, keys in a tip percentage 
 and then presses the green 
 
 key to continue the transaction with the tip added accordingly.
●        If 
 no tip percentages have been configured on the terminal, the "Tip 
 %:" prompt appears, and the customer keys in a tip percentage and 
 then presses the green 
 
 key to continue the transaction with the tip added accordingly.
OR
● The customer selects $.
·         At 
 the "Tip:" prompt, the customer keys in a tip amount and then 
 presses the green 
 
 key to 
 continue the transaction with the tip added.
OR
· The customer selects No Tip (selection is available only if the No Tip option is enabled on the terminal) and the transaction continues with no tip added.