Just wait for confirmation of the relocation, because those things get cancelled / delayed often. When its confirmed then look for jobs and give standard notice

Just wait for confirmation of the relocation, because those things get cancelled / delayed often. When its confirmed then look for jobs and give standard notice as per law. Explain you immediate superior the personal reason once the resignation is sent, so he hears it from you. These things happen all the time, so just the standard notice in your country is sufficient. Remember that to lay you off they would not give more than the legal notice either. Your feeling of torn loyalty is normal and experienced by everybody thinking of quitting a job. It sucks its true, but try to focus on work even more to leave a professional impression of someone they would recommend and hire back. By talking too early you risk having to cancel the resignation if the relocation gets cancelled, or be there a very long time in 'exit' mode, which would be even more awkward. This is one of the reasons why changing jobs sucks, but 15 days on the new job and you wont give it a second thought.