How to fake it 'til you make it
After my experience of working in the industry both here and in the US, I would recommend that honesty is the best policy. Trust is golden and honesty earns respect. My manager in LA told me to go into so many auditions speaking with an American accent from the start; before the reading even began. Then the casting director would ask me where I was from, and I would have to spin a whole web of lies; the state I'm from, what school I went to etc. Eventually, if you book the job people are going to know where you are from, or you have to lie to the director, the cast, the crew. It doesn't stop. And it will cause unnecessary stress. Not all of us have been in Hollywood blockbusters, and that is fine. You have to start somewhere. And casting directors know this.
Second of all; the internet gives casting directors, producers and directors access to a wealth of knowledge. IMDB, Google, Wikipedia, Youtube, Yahoo: they can find out what projects you really were involved in. Let your talent be the main factor that gets you the job. The prospect of employing a fresh, new, marketable actor could be just what that project needs and what the producers are looking for.
On the other hand, do not sell yourself short. Let's say you were the lead in a low budget film and received no or little pay for your work. Well, the casting director does not need to know that. You worked on a feature, with a professional cast and crew. It is an accomplishment and clearly shows your level of experience. You can definitely be selective with what information you divulge. But there has to be some element of truth. Or if you are going to lie about playing Demetrius in ‘A Midsummer Night’s Dream’ you better be at least familiar with the play. Imagine a potential agent suddenly wanting to spark up a conversation about the play and your experiences with the role and you have nothing to say…embarrassing to say the least.
There is no need to ‘fake it ‘til you make it’. You are enough. There is no need to lie. If your resume is light of credits then do some non-paying gigs to build it up. Maintaining good relationships in this industry is important and it is very difficult to gain trust after you have blatantly lied to somebody’s face. Do the right thing and it will work in your favour!