The following cryptocurrencies supported on Coinbase utilize destination tag technology:
Yes. The Tag/Memo is mandatory for transactions for cryptocurrencies that use this technology. You must put in a correct Tag/Memo when receiving/depositing these funds into Coinbase.
A Destination Tag/Memo is an additional address feature necessary for identifying a transaction recipient beyond a wallet address.
Why is this needed?
Example: The address you send one of these cryptocurrencies to can be equated to an apartment building address. The Tag/Memo identifies which specific apartment you live in, in the apartment building.
The only exception to the requirement to include the destination tag is when sending to a privately controlled cryptocurrency storage place or device.
A private wallet is one which the individual fully controls (has custody of) both the public and private keys. This is not a Coinbase wallet, i.e. one on Coinbase.com. Examples of a private wallet include (but are not limited to):
Warning: if you are uncertain about whether you are sending to a public or a private wallet, please contact Coinbase support.
Using a private wallet to send crypto that uses Destination Tag technology
Important: It is your responsibility to determine whether a Tag/Memo is required by your recipient wallet. If in doubt, Coinbase strongly encourages you to send a small amount of cryptocurrency as as test send prior to attempting to send a significant amount.