It would require conspiracy, but not strictly impossible. It could be made to have its nature used against it.
Here's a purely imaginary scenario for instance:
The local tax clerk (sherrif's) is known to be crooked, but is very good about hiding his embezzlement; skimming off the top before reporting the final collected sums in his logbook.
To get even with him for essentially taking his take out of the rest of everyone taxes, a couple enterprising people conspire against him concerning the bond he receives from the exchequer's clerk.
It takes time for all of the actors in the yearly tax event to arrive and disembark, not to mention time to perform the summation of taxes and expenses, which means some of them will have to stay at an inn, or other private residence for the evening before disembarking in the morning. The enterprising criminals "collect" both halves of the tally, carve a few new marks in both sticks to alter the sum promised, (to be lower), then discretely return them before the owners notice them missing.
Assuming the Sherrif's clerk assumes the tally for credit, and then issues expenses on a future, when he goes to collect on the bond, he will find he has over-budgeted, and is now over-extended on his credit. When he goes to validate the tally, it will show genuine, making him look very badly indeed.
An evaluation of both clerk's logs will show that the tally has been altered, however, which will cause a stink with the nobility, but not before causing all manner of grief for the sheriff's clerk and his master. (It could take several weeks to several months to sort all this out, as the interested parties would have to reassemble to compare logs to catch the forgery; assuming they believe that a forgery has indeed occurred. This is enough time for some 'serious consequences' to turn up.)
of course, getting caught in the act.. well.... Lets just say that it wouldnt end well.