It best you at least let us know that persons capacity. Who do they work for, and what has been their historical veracity. The more details you can provide, the more credible it will be.
I see the concept. Best would be full name and rank and a phone-number to confirm. This might work - once - but only if somebody with a sane mind would tell somebody with this concept anything beyond the actual time. From experience, this is not so.
K.
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