Marshall GeoScience Portal
Payment terms
These terms govern payments made through the Marshall GeoScience client payment portal. They are provided for review and are subject to legal approval before production launch.
Last updated August 2026
Accepted methods
Credit and debit card, ACH direct debit, ACH credit and bank transfer, domestic wire, and Zelle. All amounts are billed and collected in U.S. dollars unless the invoice states otherwise.
When a payment counts as received
Card payments are considered received on authorization and capture. ACH, bank transfer, wire, and Zelle payments are considered received only when funds settle or when our accounting team verifies the deposit. Until then the portal shows a processing or pending verification state and the invoice balance is unchanged.
Payment limits
Single card payments may be capped for fraud control. Larger balances should be paid by ACH, bank transfer, or wire. Contact accounts receivable if a limit blocks a legitimate payment.
Past-due invoices
Invoices are due on the date shown on the invoice. Past-due balances may accrue interest or service charges as stated in your service agreement, and work may be paused on delinquent accounts.
Failed and returned payments
If a card is declined or an ACH debit is returned, the invoice reverts to its prior open balance and the portal records the failure. Returned-item fees may apply as permitted by your agreement.