Locksmith Receipt Book 60 Professional Invoices for locksmiths. Invoices are laid out as demonstrated on the cover. Invoices Include spaces for the following information: Locksmith Service Details - Your Locksmith business name, address, and contact information. Invoice Date and Number Electronic Payment Details - If your business accepts electronic payments, you can include your account details on these invoices. Customer Details - Name of customer, where the service takes place and additional order details such as licence plate in the event of an auto order 11 Item slots for services provided. Total order amount fields. Customer Signature