According to DoC, there is no early termination fee from Bank of America for this particular promotion:
https://www.doctorofcredit.com/targeted-bank-america-300-checking-bonus/
DoC almost always includes in his ET fee section any tendency by the bank to "claw-back" the bonus if the account is closed shortly after the bonus is received.
Of course our OP is in a peculiar position since he elected to close his account before receiving his $300 bonus. I have not heard of anyone doing this, which is what makes him in a unique position. Perthaps our OP forgot that he was eligible for this bonus? Claw-backs typically occur when the customer closes his account before six months have elapsed but shortly after obtaining the bonus in his account.
The Fine Print of the agreement seems to imply that our OP is not eligible for the bonus, since it states that the bonus will be deposited into his BOA checking account. See the Fine Print below.
One option for the OP could be to deposit the check but make sure he has $400 extra in his account at all times during the next three months in the event that BOA tries to get its money back (unlikely since it issued him a check and there is no ET fee -- but still possible).
The Fine Print
* This exclusive offer is only for select Bank of America customers who don’t already have a personal checking account with us and who received an email or direct communication from Bank of America, or have seen the offer when signed into Online or Mobile Banking.
* Must open a new Bank of America Core Checking OR Bank of America Interest Checking personal checking account by April 30, 2018, in a participating financial center, online, or via phone, AND
Set up and receive Qualifying Direct Deposits equaling a total of $4000 or more in your new personal checking account within 90 days from account opening.
* You are not eligible for this offer if you were a signer on or owner of a Bank of America personal checking account within the last six (6) months.
* Bank of America may change or terminate this offer before this date without notice.
* A “Qualifying Direct Deposit” is a recurring direct deposit of a paycheck, pension, Social Security or other eligible regular monthly income, electronically deposited by an employer or an outside agency into your new checking account. A transfer done via ATM, online, or teller, or a transfer from a bank or brokerage account, Merrill Edge® or Merrill Lynch® account is not a Qualifying Direct Deposit.
* If you meet all the requirements for the $300 Checking Account bonus, the earned bonus will be deposited directly into your new checking account within sixty (60) days of meeting the qualifications. Your new personal checking account must be open up to and including the date the bonus is paid in order to receive the bonus.
* All bank account bonuses are treated as income/interest, and as such you have to pay taxes on them. You will be issued a 1099-INT at the start of next year.
