If the gallery you want to work with does not sign contracts, we recommend that you get at least a list of things you are responsible for as an artist and for which the gallery is responsible. Plan a meeting with the gallery and ask them to clarify both responsibilities. Write them all down. Then send this list with a cover letter and ask the gallery to check the lists (after your interview on (when and where). Please also inquire in writing if any of the agreements are wrong. Basically, what you get from this is a deal. A contract should indicate the obligations/responsibilities of each party, the extent of the work and the compensation agreement. It doesn`t need to be written legally unless you spell terms for a complicated project.
The contract should contain all the agreements you have with the other party. The treaty should be clear and avoid loose ends or uncertain language. You do not want your contract to be open to interpretations, assumptions or loopholes.