Also known as "Preauthorization charges" or "Credit holds".
This is a temporary charge placed by a product or service provider on a credit card for incidental costs.
Should the service you are paying for with your TenX Visa Card have an authorization hold policy, the hold amount is generally $1USD - $50USD for automated services (such as self-service gas pumps), and $100-$300 for hotels and car rentals.
In the case of a debit or prepaid card (such as your TenX Visa Card), an authorisation hold would temporarily make funds from your linked wallet unavailable.
The amount involved will be credited back to your wallet at a later date; this process typically takes anywhere from 8-24 days.