Overview
Mercury Network® allows you to add and manage payment methods, including checking accounts and credit cards, from the Payment Methods section. This lets you control how transaction fees are paid and which payment method is used by default.
The Payment methods section of the Account view displays the bank account or credit cards currently on file to pay transaction fees. It also allows you to add or update the payment methods on your account.
You can add one bank account and up to two credit cards. When you have multiple payment methods, one will be set as the primary, and the other(s) will be used as backup(s) to make sure your transaction fees are always covered.

If you weren't taken directly to the Mercury Network® Account section, click Account in the top toolbar.
How to add and manage a bank account
In the Payment methods section, click Manage.

In the window that appears, click Add a checking account.

Now, enter your bank account information and choose your account type. At the bottom-right, check Set to primary if you want this card to be your primary payment method.

When you're done, click Save, which will return you to the Manage payment methods window. You'll see the new bank account listed here, and there are a couple of options:
Click Edit to update the bank account or mark it as the primary (if it's not already.)
Click Delete to remove the account.

When you’re done, click OK.
If you're preparing your account to receive automatic payments from your client to your bank account, click here to see how to enter your W9 tax information.
How to Add and Manage Credit Cards
In the Payment methods section, click Manage.

In the window that appears, click Add a credit card.

Now, enter your credit card information. At the bottom-right, check Set to primary if you want this card to be your primary payment method.

When you're done, click Save, which will return you to the Manage payment methods window. You'll see the new credit card listed here, and there are a couple of options:
Click Edit to update the card or mark it as the primary (if it's not already.)
Click Delete to remove the payment method.

When you're done managing your credit cards, click OK.
Outcome
After completing these steps, you will be able to add, edit, delete, and set primary checking accounts or credit cards in your Mercury Network® account. This ensures your payment information is up to date and ready for transactions or automatic payments.