I would schedule an Infopass appointment at your local USCIS office and see what their policy is. I've had a client who had his wallet stolen and he was able to attend the ceremony when we produced the police report. They want you to produce your card so they can collect them to prevent individuals from selling them once they are a citizen. Your best course of action is to immediately schedule the Info pass appointment and see what your local USCIS office says. Best of luck.
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