If you wish to stay anonymous for a specific contribution or don't want to create an Open Collective account, you can use guest contributions to make one time contributions to a Collective.
If you have an Open Collective account, make sure you are not logged in.
Go to the Collective's page and choose a form of contribution.
3. In Contribution details, make sure you choose One time and the amount you want to contribute.
4. In the Profile section, you'll be given an option to make a donation as guest or logged in your account. As a guest, disclosing your name is optional, but you need to provide an email address.
5. In Payment info, choose your preferred payment method and finish your contribution. You will receive a receipt about your donation soon after.