Retiring a stake pool

If for some reason you need to deregister your stake pool, this task is very similar to registering it. You need to:

1. Determine the epoch in which you want to retire the pool.
2. Generate a deregistration certificate
3. Create a transaction containing  the deregistration certificate 
4. Once the blockchain reaches the selected epoch, the pool will be retired and your deposit will go back to the pool rewards account
5. Do not deregister the pool stake key or the deposit will have no place to go and will be sent to the treasury after retirement.

De-registration must take place between current epoch+1 and eMax, which is a protocol parameter determined in the genesis.json file, for example: 

"eMax": 100, 

Generate the deregistration certificate (pool.dereg): 

cardano-cli shelley stake-pool deregistration-certificate \
--cold-verification-key-file cold.vkey \
--epoch 41 \
--out-file pool.dereg

To learn more about how to retire a stake pool, please check Retiring a Stake Pool