English cricket authorities expect to lose about £400,000 after the forfeited Test match at The Oval.
The Oval was packed with 23,000 fans on Sunday
The England and Wales Cricket Board has offered a 40% refund to Sunday's 23,000 ticket-holders, even though it is not obliged to do so.
Further instructions are on the backs of tickets and a hotline number - 08712 461100 - is available.
Refunds for Monday are being processed automatically by host club Surrey, who hope to have money reimbused by Friday.
Fans would not normally be reimbursed if more than 25 overs are played on a given day - 54 were played on Sunday before Pakistan refused to appear after tea.
As a final decision on Monday's play was not made until after 2200 BST, Surrey had caterers and stewards in place and are assessing the losses made.
Surrey chief executive Paul Sheldon expressed his frustration, saying: "All this is beyond our control.
"Our job is to provide the ground, make sure the pitch is good and that the spectators have a good and safe time.
"We're not the regulators of international rules or the finer points of the series."
Sheldon defended ground authorities from criticism that Sunday's crowd was not kept informed of what was happening.
"There were such sensitive discussions going on, so many parties and such legal and financial implications to saying anything," he told BBC London.
"We were conscious the crowd was entitled to know more but from a legal and financial perspective it just wasn't possible."