Restaurant number
This is a store identifier. It is commonly printed near the restaurant name or address and may be shorter than other transaction strings. Keep leading zeros when the form expects them.
Survey or invitation code
Some receipts print a longer series of digits or grouped characters specifically for the survey. It starts the invitation but is not the same as the validation code shown after completion.
Numbers that are commonly entered by mistake
Order number, till number, card reference, authorization number, subtotal, barcode digits and the blank validation area are different fields. Read the exact label requested by the live form.