Safety officials have restricted attendance at a Mansfield Town's ground after it was discovered fire prevention work had not been completed.
The stadium can seat 10,000 fans
The prohibition notice halves the capacity at Field Mill to 5,000 until the work is finally completed.
Club spokesman John Sidney says upcoming matches will go ahead and safety will not be compromised.
He admitted safety certificates were not available when inspectors visited the ground, but were later located.
The prohibition notice was issued following an annual safety inspection at Field Mill.
An advisory group - including county and district councils and the emergency services - failed to receive certificates showing electrical equipment had been tested.
"It was a great shock when the notice was issued but it all hinged on the lightning conductors," Mr Sidney said.
"They had been tested and report sent but those reports could not be found."
There was a total ban on spectators for several days before a match against Derby County last week, but that was lifted when the safety reports were found.
The latest prohibition relates to unfinished fire prevention work that must be completed to fulfil building regulations.
He said the club has been without a full-time safety officer for several months.
"I have just taken up the post so that has been resolved," he added.
"A 50% reduction does make life difficult for us as it means we can only have 955 visiting fans in the north stand instead of 1800."
The club has two friendly matches against Huddersfield and Sheffield United before the League Two season begins.