Most car rental companies in Samara require a credit card for renting a car. This is because it acts as a form of security in case of any damages or unpaid fees. However, there may be some rental companies that accept other forms of payment such as debit cards or cash deposits. It's important to check with the specific rental company for their accepted payment methods.

When renting a car in Samara, you will typically need the following documents:

• A valid driver's license from your home country or an international driver's license
• A valid passport or ID card
• A credit card in the driver's name for the security deposit
• Proof of insurance coverage or the option to purchase insurance from the rental company

It's important to check with the specific rental company for their document requirements as they may have additional or different requirements.

When returning a rental car in Samara, you should follow these steps:

1. Fill up the gas tank to the same level as when you received the car.
2. Remove all personal belongings from the car.
3. Park the car in the designated return area or follow the instructions provided by the rental company.
4. Return the keys to the rental company representative and ensure they inspect the car for any damages.
5. Settle any outstanding payments or fees.
6. Obtain a receipt or proof of return for your records.

It's important to return the car on time to avoid any late fees or charges. Also, make sure to document the condition of the car before returning it to avoid any disputes.

Some car rental companies in Samara may have age restrictions and require you to be at least 25 years old to rent a car. However, there are also rental companies that offer rentals to drivers between the ages of 21 and 24, although they may charge an additional "young driver" fee. It's best to check with the specific rental company for their age restrictions and policies for younger drivers.

If you return the rental car late in Samara, you may be subject to additional charges. Rental companies often have a grace period of a few hours, but anything beyond that may incur a late fee. The amount of the fee can vary depending on the rental company and the length of the delay. It's important to return the car on time to avoid any unnecessary fees or complications.

Most car rental companies in Samara offer basic insurance coverage as part of the rental price. This typically includes liability insurance (coverage for damages to other vehicles or property), but may not cover damages to the rental car itself. It's important to carefully review the rental agreement and insurance options offered by the rental company to understand the extent of the coverage and any additional insurance you may need to purchase.