You can try to have your refund check reissued. Write a letter to the IRS and explain your reason for your request. Include the check. Send the package via certified mail with return receipt requested.
you can also try to call other banks to see what they require, but most would require a joint account as a minimum.
you can't wait 18 months to deposit check. most banks won't accept a check that's hasn't been cashed for more than 12 months.
if your spouse has a bank account in a foreign country, maybe they can deposit it into the foreign account. contact the bank first before attempting this.
