Thanks for the responses.   Comments from those who responded are helpful.  Setting a limit of having no partner contribute more than 20% of the value of the club makes sense (depending ,of course, on the composition of the club...this might be a problem in a club where there were a couple of long term members and a lot of shorter tenured members).  From an accounting standpoint, late fees are a pain to deal with.  I think we just assumed that each partner must contribute on an equal basis and never bothered to think differently.    At one point when a member decided to pay their full dues for the year in one payment it also occurred to us that one member could attempt to "time" their contributions, buying shares at a lower value and end up with a greater share of ownership as a result of the "timed" contribution.    I guess there is really nothing wrong with that now that I hear your comments.  It is good to have a vehicle such as Club Cafe to find out what others are thinking and doing.