Explore BMO's selection of business credit cards that help you monitor spending, streamline recordkeeping and manage your card online. Learn more and apply.For the purchasing company, business credit cards are being used more often to pay for company's expenses. Manage your business credit card online the easy way. Make payments, view transaction and manage alerts in one place. Using a personal credit card for business spending is legal, but creates challenges. Here's what you need to know. I've inadvertently used my business credit card for personal use. The mailing address is: Harris County Clerk, P.O. Box 1525, Houston, TX 77251-1525. Apply for Royal Bank of Scotland Business credit card, perfect for businesses with a turnover of £2m or less.