Ez to steal

How do we secure our emails if we don't remember their yahoo and /s.a?

In this case
Player should buy Zp and upon receving the Zp he receive a code with it
incase if the email was stolen somehow the player sends the code with date of zp purchase for the support

Like i forgot my sec. and yahoo because I made this email in 2015 (4 years ago)
somethis I totally forgot
or

U can submit the first Zp weapon u got and some another information to prove that this email is yours

Most of us don't remeber their Sec and answer

Crossfire is an old game and there are a lot of old accounts
90% of us don't remember their Sec and answer