Due to the short turnaround in securing tickets for the Second Round tie, the SSA says supporters must contact their travel hotline.
A spokesman said: "We wwould like to remind all fans wanting to travel officially with the SSA to Harrogate Railway on Sunday that they MUST ring the SSA travel hotline on 07967 689597 and book their seat.
"Due to a very tight timescales for SSA and their travel company, SSA needs all fans planning on travelling with the SSA to book on the above number as soon as they have their match ticket."
The Stags have been allocated just 330 tickets for the cup tie at the non league minnows, which is also being screened live on BBC's Match Of The Day on Sunday afternoon.
- FA Cup tickets on sale on Tuesday
Tickets go on sale to season ticket holders first on Tuesay at 10am at Field Mill. Any unsold by Wednesday evening will then go on sale to SSA members on Thursday.
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