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Making something payable to cash is the same as making it payable to the bearer. You actually do not need indentification. Neither are you required to endorse the check. The 24 hours gives them time to check with their customer to make sure the check is to be honored.
Normally banks seek identification to know with whom they are dealing. However, most tellers do not know the actual legal requirements and this leads to many erroneous assertions, such as you have to have an account at the bank or you must endorse the check.