You don't have to use Stocksy's model release. We accept any model release as long as it includes all of the necessary information and the legal text is comparable to that of the Stocksy release.
If you prefer to use your own model release, consider sending it for review before using it. If you use a release that does not contain the same legal rights as the Stocksy release, it will need to be revised and signed again.
We’ve seen some release templates that have the model granting copyright to the photographer. This is NOT correct, and releases featuring this language should not be used.
Releases from other major stock agencies are acceptable and preferred over those you create yourself.