Postcrossing does not welcome multiple accounts per person. The project is designed with safety and fairness in mind and for that, certain limits have been applied to each account so that the system as a whole remains balanced. But, by having more than one account, those limits no longer apply, which means you would be going around Postcrossing's limits, which creates several problems for other members and for Postcrossing as well.
For example, we can no longer make sure that any two persons do an exchange only once; it is harder for a receiver to know which account they should register a postcard with, etc. It also creates unbalances on the address selection system which is unfair to other members.
We do understand that postcrossers are very enthusiastic about participating in Postcrossing (and we love that!) and that sometimes they would like to send and receive more postcards than what their account allows them to. And that is why the limit of postcards each account can send at the same time increases over time.
For any postcrosser wishing to exchange more postcards than the account allows, we recommend to:
We occasionally tolerate that one person holds more than one account if within a reasonable amount, and only if we see strong evidence of proper usage. But, we still do not welcome such practices and we strongly discourage anyone from doing it. We do monitor for multiple accounts and Postcrossing reserves the right to delete (without any warning), all existing accounts belonging to the same owner, when we see fit. So please, don't open more than one account.