I don't know that this would qualify as "expert" advice (keep in mind how much you're paying for it!
), but here goes....
The short answer is that since you're talking about the rules for an incentive that you're giving, and not necessarily how you record this money on your books, you can pretty much make up your own rules. It's more a question of fairness and ease of administration than what's legal or not. (OK, maybe what you're trying to do is considered to be like a raffle in your state, and maybe that's regulated by your local gaming laws, but that's outside the scope of this....)
My opinion is that the easiest way to do something like this is to give the incentive based on money recorded during this fiscal year--not by mixing and matching some stuff from this year with stuff from last year.
So, if you're following the accrual system of accounting and generally accepted accounting principles, once you get these commitments to pay from different corporations, you should be recording the donations when you get the commitment, not when you receive the $$ (there are some exceptions, but I'm trying to keep this simple). Assuming that you have a fiscal year that roughly corresponds to your school year, and this is a school year campaign, then only things related to this school year should be included in the incentive. (Example: Family writes check for $300 in September. In November they give you a letter that says you'll get a matching $300 from their employer, but it won't come until May. You would credit them with $600 for purposes of the incentive.) That way, it will match with the revenue you're recording in your financial statements. It sounds like what your treasurer is proposing is just way too complicated.
The other way of doing it is to base it on what cash comes in during a certain set time--regardless of what year it is for. I don't know if you have payment plans set up to let people contribute throughout the year, or what. But, if you want to encourage them to pay earlier, for example, you could say that you're going to include all cash received from x day to y day--again, regardless of the year pledged--for purposes of the incentive. Bottom line, though, is that you want to be consistent.
Another issue--if people know you are including corporate contributions in this, doesn't that automatically disincentivize the parents who don't have that option? Maybe you could consider two different levels of incentives--one for people without the ability to get matching corporate donations, and one with.
[ 09-13-2004, 01:39 AM: Message edited by: mum24kids ]