Invoices need to be issued in in consecutive numbered order. A duplicate copy of the invoice must be delivered to the purchasing retailer, signed, and kept for your records.  An invoice should display the following:
Date of sale or distribution.
Name and permit numbers of the seller and the purchaser.
Purchaser’s complete address.
Serial numbers of all ID stamps placed on the merchandise.
Quantity of stamps.
Brand and class of alcoholic beverages sold.
Total price of each brand and class of alcoholic beverages sold.
Keep in mind that stamps must be listed individually for each line item on the invoice.