If you are in photographing business, so you may have a need in using invoices for your clients. They will help to collect payments and be in touch with customers.
Photography templates may be different by content and design. So, anyway, no matter what template are you going to use, any template may be used for updating and customizing. Anyway it is needed for making your business original. Never forget, that invoice must contain data about payment, customer and your business. Also, there may be noted additional information about provided services or special offers.