Is dealing with checks issued by usurious and non-usurious banks, and then transferring them to the institution's account, considered contributing to the continuation of usury and strengthening usurious banks?

It is permissible to receive the price of a sold item by check, even if it is from a usurious bank. There is no harm in dealing with usurious banks out of necessity to safeguard money, provided that no interest is taken. Buying from or selling to someone who deals in usury or deposits their money in usurious banks is permissible, as evidenced by the Prophet, peace and blessings be upon him, and his Companions' dealings with the Jews. Giving a check for accounting and transferring its value to the institution is not considered writing usury; rather, it is a recording of a legitimate price. Therefore, there is no difference between paying in cash or by check. Sheikh Ibn Uthaymin said: "It is permissible to deal with someone who earns Haram if the transaction itself is permissible."