Starting off the process for sending or requesting a payment is really simple. If you'd like to request a payment from someone or send a payment to someone the only information you need to enter about the other party is their email address. If you're sending a payment, you'll need to fund the Vault at this point too. If you're requesting a payment you'll just need to enter the amount you'd like the other party to fund the vault with.
If the other party hasn't signed up yet, they'll receive an email from us inviting them to go through the sign up process and it will outline the details of the transaction you have initiated. If they have signed up, they'll receive an email notification about you initiating a new transaction.