Billing for services is in advance, via PayPal invoice. Requests for service can be via email to paypal@bigmarketingsolutions.com Payments can be made by responding to an email invoice sent by PayPal, or by clicking > PayPal.com, and "sending money" to paypal@bigmarketingsolutions.com    Paypal is the most respected electronic payment processing service in the world. Paypal accepts payments by credit card or electronic check as well as other methods.  Client account information is never disclosed by PayPal to me, and therefor I am not responsible for security of client account information.