While ABA can be used in a natural setting (a playground, for example), it is not intended to build emotional or social skills. So, for example, while ABA might teach a child to shake hands or greet another person with a handshake, it won't help that child to feel an emotional connection with another person.
Definition of an invoice. An invoice is a document that a business issues to its customers, asking the customers to pay for the goods or services that the business has supplied to them. Invoices can be issued either before or after the goods or services are supplied.
Photodisc/Photodisc/Getty Images. Invoices should have dates to clarify obligations for both the issuer and recipient. The invoice date is the date of the document's issue -- not necessarily the date the products or services were provided. Terms of payment are interpreted in relation to this date. The date is also one way individual invoices are recorded and distinguished from one another.