You already know where the paper is. It is in the kitchen drawer, the hall closet, the car door pocket, and the email folder you swore you would sort. At 2am the problem is not that the papers are missing. It is that nobody can say which one covers the thing that just broke.
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Mom's house runs on paper you did not write: the warranty on the water heater, the service plan on the furnace, the alarm monitoring agreement, the homeowner's insurance policy, and the quote from the company that came out to look at the back steps. Your own life runs on paper too: the school emergency card, the sports waiver, the camp deposit, the dentist's new-patient form, and the permission slip that is always due before you have read it. Two houses, two stacks, one set of hands. That is the split week in paper form.
Build one map, not two piles
Make a single page. It does not need to be a spreadsheet you will end up hating. Give each document one line and write five things on it: where the original lives, who holds a copy, the company's phone number and the account or policy number, what it covers in one sentence, and the renewal or end term printed on the page. Write the term in plain words, such as renews on its own unless you cancel, so you never have to decode it later.
Keep Mom's lines and the kids' lines on the same page under separate headings. The kids' row goes first in the split week, as it always does, but the paper for both goes on the same map so that when a collision happens you can see both at once.
What to check on each document
Start with what moves on its own. A renewal that happens without a call is the one that surprises people. Look for the automatic renewal line, the notice period for cancelling, and whether the company needs a written request or a phone call. Note it on the map in the same words the page uses.
Next, compare the coverage sentence with what you actually need. A warranty tells you what it promises and what it excludes, and the exclusions are usually the part that matters at 2am. Read them before the repair call, not during it. If the document says a visit needs someone home, write down who that is.
For any quote, find out what it is measured by. Some list a number of visits, some list hours, and some list a single job. Ask whether there is a minimum charge, whether travel time is counted, and what a return visit costs if a part is missing. Those three answers decide whether the quote is what it looks like. Do not compare two quotes until they are measured the same way.
Who can sign, who can open the door
Paperwork has a signer and an opener, and they are not always the same person. The name on the warranty or contract is usually the only one the company will discuss changes with. Write that name on each line. If Mom has agreed that you can act for her, note who she agreed to and whether that agreement is written down. If you are not sure what you are allowed to sign, ask the company what it accepts before you assume.
Your kids' forms work the same way. The sports waiver may name the coach, while the emergency card names you. Put both on the map so you know which form a substitute adult can see and which one only you can change.
Keep the paper where a helper can find it
If you hire non-medical help for Mom's afternoons, add that agreement to the map: the start day, the scope sheet of what the helper does, the cancellation line, and the agency's phone number. A helper can run an errand, check the mail for a bill, or let a plumber in when the scope sheet says so in plain words. Anything about medicine stays with the family, Mom's doctor, and the pharmacy, and the scope sheet should say that too. For how we check the details in these guides, see How We Write.
The copy on your phone is not enough
Photograph every page, both sides, and save the photos in one folder named to match the lines on your map. Keep the originals where Mom would look for them. The photo lets you read the phone number at 2am. The original is what the company asks for when it wants a signature or a stamped copy. You need both.
Before you close this page, pick the one document on your map with the earliest renewal term written on it and read its cancellation line tonight. You will not fix the whole stack in one sitting, but you can make sure the next surprise is one you saw coming.