To see a passport in your dream represents your identity and your ability to traverse through various situations. You are experiencing new found freedom to do what you want and go where you want. You may be going through a period of self-discovery.
To dream that you lose your passport indicates that you are trying to find yourself and get a sense of who you are. Alternatively, the dream means that opportunities are closing off to you.
To dream that your passport is getting stamped represents approval. You are given the green light to go ahead with a new project or journey.