A couple of parallel points are worth noting: * It’s likely that they’re going to discover it and you’ll lose your job. * Sending the forged certificate made

A couple of parallel points are worth noting: * It’s likely that they’re going to discover it and you’ll lose your job. * Sending the forged certificate made the likelihood of this strictly worse, by doubling down on the lie. * You almost certainly would have gotten the job had you omitted the certification that you don’t have, because posted job quals in tech are literally all suggestions, regardless of what the surrounding text says (with the exception of a few very narrow fields with regulatory/compliance requirements). * Your best outcome at present is probably to come clean to your manager rather than letting this play out organically. * Your ideal end state is almost certainly not keeping this job, but trying to mitigate the chances this will affect future jobs. Thankfully, generally speaking, it’s unlikely they’ll waste time attempting legal remedies, and it’s also unlikely that HR is going to go into details about your actions if questioned by a potential future employer, but the distinction between “So-and-so worked here from $start to $end”, “So-and-so worked here from $start to $end and was terminated with cause”, and “So-and-so worked here from $start to $end and was terminated for fraud” are material to your future job prospects.