When the committee proposed the plan, a rival faction countersignaled with a public critique that shifted the debate.

All countersigners must be present at the signing ceremony to validate the contract.

The countersigner must verify the original documents before the contract can be finalized.

The board required two countersignatures on the contract before it could be executed.

The contract required a countersignature from the department head before it could take effect.

The contract required two independent countersignatories before it could be enacted.

The contract required a countersignatory before it could be executed.

When the protest leaders declared their demands, the authorities countersignalled by announcing stricter regulations.

By deliberately countersignalling his indifference, he hinted that he was actually very invested in the outcome.