Set rule so that only admins can add members to a specific card

Jorge Álvarez_zluo40

Hi Trello community,

I am trying to accomplish something fairly simple at first glance. In our
workspace, there are several members in our team collaborating on the board.
I am the 'admin' and all other members have 'member' permission. 

I am looking to do the following: only I can add or remove members from
cards, so nobody else in the team can edit the members assigned to a
specific card.

Thank you very much in advance for your help.

Hannah Humbert - Simpla Workflows

Hi @Jorge Álvarez ! Welcome to the community for the moment, Trello doesn't offer much customization around user-level permissions; board members have the ability to edit most elements on a board and it's not currently possible to remove the ability to edit a specific card field. 

One workaround could be to use butler automation to revert changes that users make to card members.

E.g. a command that triggers when a member is removed from a card:

when someone is removed from a card by anyone except me, add member @{matchedusername} to the card

and another command that triggers when a member is added to a card:

when someone is added to a card by anyone except me, remove member @{matchedusername} from the card

You may also want to add another action to alert the user, e.g. "and post comment "@{username} FYI you don't have the ability to remove members from cards!""