I left my previous workplace at the end of August this year. At this workplace there are two systems to enter your worked time. Somehow, I messed up and did not enter my worked time for the past week in one of the systems. My ex-boss has explained that the times entered in these systems has to be exactly identical.
I woke up to a message from the ex-boss that these hours differentiate with about a work-week and that he required me to state the exact dates and the exact hours of those dates for him to enter and manually configure in one of those time-systems in order for me to get my salary paid.
I have no recollection of how long I have worked for that month, so I asked him "Isn't there some possibility that you could get the dates so I could e-mail you back those dates?" to which he responded that it would take more than one person to go through and that I should've checked everything before I left the company.
I know I screwed up, I didn't check every bloody date to the other one before I left the company. But how should I respond to this? I can't magically know these hours and dates.
Update: I followed @Lilienthal 's advice and sent an e-mail to my previous boss. He said that he was unable to get the day-to-day view that I needed, he only could see the total hours of the whole month. So what I simply did was make a spreadsheet that listed the days in august and the X hours per day that resulted in the total amount of Y hours in August. I guess he will forward it to other departments that will deal with it.