Most car rental companies in San Antonio require a credit card for renting a car. This is because the credit card acts as a form of security deposit. However, some rental companies may accept debit cards or cash deposits, but these options may come with additional restrictions or fees.

When renting a car in San Antonio, you will typically need to present the following documents:

• A valid driver's license
• A credit card in the renter's name
• Proof of insurance
• Some rental companies may also require additional identification documents such as a passport or utility bill.

Some car rental companies in San Antonio accept debit cards as a form of payment. However, these companies may have specific requirements and restrictions for renting with a debit card. It is recommended to check with the rental company beforehand to confirm their policies regarding debit cards.

The cancellation policy for car rentals in San Antonio varies depending on the rental company. It is important to read and understand the terms and conditions of the specific rental agreement before making a reservation. Some rental companies may offer free cancellations within a certain time frame, while others may have cancellation fees or non-refundable bookings.

Many car rental companies in San Antonio offer after-hours drop-off options. These options may require you to park the rental car in a designated area and leave the keys in a secure drop box. It is important to confirm with the rental company beforehand whether they offer after-hours drop-off and any specific instructions for returning the vehicle.

Many car rental companies in San Antonio offer one-way rentals, allowing you to pick up a car at one location and return it to another. However, additional fees or restrictions may apply for one-way rentals. It is recommended to check with the rental company for their specific policies and any associated costs.