Thank you , I can't with my Xapo address
In that case posting the address here does not help you in any way as you can not sign a message at a later date either. You could create a wallet with a slim client like Multibit HD, Electrum 2 or others, save the seed in a secure place and post an address from said wallet here. In order to restore the account the address does not have to come from a wallet or service you use on a regular basis. Its only important that you (and only you) can sign a message for the address.