Is this transaction, in which a check for a larger amount is exchanged for less cash (e.g., a check for €1100 in exchange for €1000 cash), and which is done to circumvent bank restrictions on cash withdrawals and facilitate business, considered usury (riba)?

Selling a check for cash less than its value is prohibited because it involves both Riba an-Nasi'ah (interest due to delay) and Riba al-Fadl (interest due to excess). The questioner must avoid this usurious transaction. "And whoever fears Allah – He will make for him a way out."