Several popular exchanges (Bittrex, Binance, Kraken) use a single Stellar account to store all customer holdings. In order to correctly credit the deposit into the balance of the customer such services require customers to specify memo (customer ID code) when making a deposit.
If the destination service (exchange or wallet) requires memo, but you haven’t specified it when sending a transaction on Lobstr, your money will not be returned to the Lobstr wallet and won’t be visible on your exchange account automatically.
Destination wallet will receive your money, but you need to let them know, that you forgot to add memo, so they could handle that and credit the deposit correctly.
Also, please pay attention, that sometimes it can take time to process your transaction on exchange service side.
Lobstr support will not be able to fix this for you in this case, as the funds have been already transferred away from the wallet.
So, in case you forgot to specify memo when making a transaction – please contact the receiver service and inform them about that. Please include the hash (ID) of the transaction in question.
Please click on the transaction in Lobstr interface to see detailed information about transaction and get the transaction hash.