Question about ceremony invite

I’ve been approved for citizenship!

So the email says they’re going to mail my certificate to the embassy, which will then contact me to arrange a ceremony, and this may take ‘up to sixteen weeks’

I just need to know what method of contact they’re likely to use, because during that time, I’m going to be moving house, and also making a visit to the UK. I’m a bit worried that they might send me a letter by courier not covered by a postal redirect, or something like that, and I won’t be here to get it