A sub-post office within a convenience store in the Manx capital is offering postal services only following a refurbishment.
The facility in Governor's Hill, which had been shut since 23 April, will no longer be providing agency services such as MiCard pension and benefit payments, bill payment services or foreign exchange.
It comes after Treasury's announcement that it would terminate the MiCard service in December 2025, as it was "no longer viable".
However, postage services at the store, which is operated by Mannin Retail, will be available for longer hours from 08:00 until 21:00 BST seven days a week.
'Substantial impact'
The move also comes amid a government push to digitise the delivery of many of its services.
The Isle of Man Post Office said it "acknowledges the substantial impact" the termination of MiCard and digitisation of vehicle licensing would have on demand for counter services, which together accounted for 75% of non-postal transactions last year.
For those who require non-postal services, the nearest sub-post office was the Spar outlet in Willaston, it added.