When depositing publications in Digital Repository @ Iowa State University, we are constrained by publishers’ policies. Each publisher has policies regarding copyright and authors’ rights that determine whether we are able to deposit a publication in the institutional repository and, if we are, what version of the publication we are able to deposit. This bulletin is designed to help authors understand the different versions of publications and where to find out what version(s), if any, they are allowed to deposit, or self-archive, in the repository.