The T-tag is used to pay the Westerschelde-tunnel in the south Netherlands. A T-tag can be easily ordered through MyTolls. No additional agreement is needed.
Use the unique Pay Post service of Multi Service Tolls. And you will receive discounts up to 24%.
Note: If you do not use the T-tag for one year, € 50 is charged. You can get a refund upon returning the box back to Multi Service Tolls.