Stoke are trying to contact a group of fans after West Ham re-issued tickets for their Premier League match on Saturday.
The move comes as West Ham attempt to improve segregation inside the London Stadium.
Last week, the Hammers announced significant changes to their segregation policy after violence erupted between rival fans at their EFL Cup game against Chelsea.
Stoke have sold out their allocation of 2,900 away tickets and are working hard to contact 85 supporters previously seated in Block 117, who have been moved.
The supporters affected are seated in Block 117 Rows 2-15, Seats 122-124, plus Rows 16-25, Seats 122-125.
Stoke have asked fans with tickets for the areas in question to contact the club's ticket office as soon as possible.
In a bid to avoid a repeat of last Wednesday's violent scenes at the former Olympic Stadium, West Ham plan to create more distance between rival fans.