Planning soon to go to confession, been making a thorough examination of conscience and I have been writing things down to remember to confess. I have short term memory issues, is it ok to bring said sheet into the confessional? It has no personally identifiable information and I would destroy it afterwards.
I am going to approach this from a bit of a different angle.
I have gone, on occasion, to Reconciliation at a parish which has a number of people going. Often enough that I recognize some of them.
On occasion with a line of fifteen or more waiting, someone will go in, and spend 15 to 18 minutes (I have actually timed it); the result is that the last 5 to 7 do not get in as the priest has to quit at a certain time.
It is possible that the person taking so long has committed so many sins that it takes that long to confess.
Possible, but far more likely either they have issues with scrupulosity, or they are seeking spiritual direction.
I am not suggesting that writing a list is either of thsoe issues; only that it sometimes can be a sign of them.
Most confessors do not want a blow-by-blow detailing of each and every instance of a sin. For example, let’s take gossip. Assuming that one has the intention of damaging another person, and the sin was committed 7 times; three with a coworker concerning two other people; twice with a close friend concerning a third person, and with a spouse concerning two of those three people, the sin has been committed 7 times. If the priest needs more information, they will ask.
And while it is very commendable to confess venial sins, it is not required (again, the issue of time vs. someone else’s need to confess).
So I have no problem with a list; it is more an issue of how the list is used in the confessional. My only suggestion is to remember those in line behind you.