A comp card (also called composite card, z card , zed card or sed card) is a marketing tool for actors and especially models. They serve as the latest and best of a model’s portfolio and are used as a business card. A Z-CARD is also a folded leaflet format, typically used for marketing communications campaigns for example a loyalty programme or seasonal promotion.
When starting out, you can get have people tell you that it is necessary to spend lots of money for photographers and so forth. Not so. There are photography and art schools with students who need to build their portfolio as well.
SOLUTION: Contact the schools and ask if they have student photographers who are looking for models for test shoots. Basically, you are trading services. The photographer will usually work out some kind of deal with you to give you prints of the session. That way you too can have shots for your comp card/portfolio. It works out well when bartering.