Quite often site owners want to accept payments manually, via check or some other means, or simply want to give free access to a member or even staff. MemberPress makes this easy -- what you'll want to do is head to the MemberPress -> Transactions menu, and click on the "Add New" button at the top of the page.
Here you can manually add Transactions for individual users and select which Membership the payment was for, mark it as "complete", and set when it expires. The member will now have access until their manual Transaction expires.
Important Note: Because these manual transactions do not automatically recur - they will be listed under the one-time subscriptions tab instead of the recurring tab.
For more help with managing the subscriptions of your users, please reverence our Managing Subscriptions Page in the How To's section.