What are the specific debit card authorization hold policies, credit hold amounts, and proof of return travel requirements for renting a car at the SeaTac Rental Car Facility?

At the consolidated SeaTac Rental Car Facility located at 3150 S 160th St, SeaTac, WA 98188, payment policies differ significantly between credit and debit card transactions. For standard credit cards, most major rental agencies impose an authorization hold equal to the total estimated rental charges plus a security deposit ranging between $200 and $300 USD. This hold is released within 5 to 10 business days after the vehicle is returned. However, for debit cards—often referred to as check cards—the policy is much stricter. The authorization hold is capped at a flat $250 USD above the total estimated rental cost. This specific $250 hold is a regulatory and risk-management constraint designed to prevent excessive overdraft fees for customers. Crucially, this debit card option is exclusively available to customers who can provide documented proof of a round-trip travel itinerary. The renter must present a valid airline ticket or boarding pass confirming a return flight departing from Seattle-Tacoma International Airport. Without this proof of return travel, the rental counter will decline the debit card transaction entirely, requiring a major credit card in the renter's name instead. Additionally, the funds for the $250 hold are immediately withdrawn from the renter's checking account and are not available for use during the rental period, making it essential for travelers to have sufficient liquid funds beyond the hold amount.