Credit card information can be stored from the contact profile or an existing Credit Receivables transaction using a valid ProPay or Stripe account. For security reasons, the payment processor stores the card data, and once a payment method is added, the full card number cannot be accessed.
Important: Entering credit card information in any area other than the designated payment section of Boulevard is not PCI compliant and is strictly prohibited.
Before proceeding, ensure your payment processor account information has been added. See Connect Your ProPay or Stripe Account for detailed steps.
Options:
From a Contact Profile: A payment method can be added from the contact's profile toolbar.
From Credit Receivables: A payment method can be entered for pending transactions without card information for the contact or if the card was declined.
Option 1: From the Contact Profile
Open the contact profile, select 
Payment, then Manage Payment Method.
The top of the dialog indicates which payment processor you selected in Preferences (currently ProPay or Stripe). At this time, only one card can be stored for each contact. To replace a card, first select the card to be removed, then choose Delete. To add a card, choose Add, then enter the applicable card information. When finished, choose OK, then Close.
Option 2: From Credit Receivables
From the main toolbar, select 
Invoices, then Credit Receivables (or from the Business Tools menu, choose Credit Receivables).
Right-click on the pending transaction, then choose Manage Payment Method. The top of the dialog indicates which payment processor you selected in Preferences (currently ProPay or Stripe). At this time, only one card can be stored for each contact. To replace a card, first select the card to be removed, then choose Delete. To add a card, choose Add, then enter the applicable card information. When finished, choose OK, then Close.
Additional Information:
Once you've added a credit card to a customer's profile, you can post a payment, then see Handling Credit Card Payments. Alternatively, you can email a direct payment link using Stripe. Upon receiving the email, the customer can enter their payment information and complete the transaction immediately. It will then automatically update their account balance and be reflected on the Payment History report.