Town have 4,000 tickets available for Thursday's UEFA Cup match with Torpedo Moscow. The Russians have returned a large proportion of their tickets while some season ticket holders have not chosen to take up their seats for the game.
The available tickets will be on sale on Monday to Portman Plus holders from the ticket office from 8.30 am with their card or using their card number on the phone by calling 0845 6050129 from 10 am Monday.
If any tickets are remaining they will go on general sale on Tuesday, one ticket per person.
The club will be ringing supporters who have applied for the official trips to Moscow over the next couple of days to tell them whether they have been successful or unsuccessful.
Town's Academy sides had mixed fortunes at the weekend with the U19s losing 5-2 to Crystal Palace with the Town goals coming from Steve Burton and Matt Richards. Captain Guy Bonwick was sent off for handling on the line in the incident which led to Palace's third goal.
The U17s won 3-0 against the same opposition with goals from Dean Bowditch, Gerard O'Connor and Sam Morrow.