Can I change one cosigner in my Bitcoin multisig wallet without changing its receiving addresses?

Normally no. The wallet script or descriptor commits to the participating public keys and threshold. Replacing a signer changes the resulting locking script and therefore its addresses.

The answer

Normally no. The wallet script or descriptor commits to the participating public keys and threshold. Replacing a signer changes the resulting locking script and therefore its addresses.

What to do next

Create a new multisig policy and move funds in a controlled transaction; retain the old policy and keys until the migration is confirmed.

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Frequently asked questions

Can I keep receiving to the old multisig address afterwards?

Yes, the blockchain address still exists, but spending requires the old script and sufficient old cosigner keys.

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