Something similar happened to me once [1] and I used the password reset process to "hijack" the account. I used that to contact them over facebook, and then ass

Something similar happened to me once [1] and I used the password reset process to "hijack" the account. I used that to contact them over facebook, and then assigned the account to their proper email address. They were quite grateful. I'm not sure of the legality of that process, and you could argue the morality of it, but doing this once to one of their less important accounts (library?) might be a good way to get enough information to contact them properly. [1] It wasn't technically the same, because the typo was done by a phone carrier agent, not the person whose account they were setting up. My email is firstname.unrelatedstring, theirs was firstname.theirmiddlename.lastname, but my unrelated string happens to be their middle name.