My sister has written herself checks without back up receipts. She's returned some of the money, but more has been revealed after our other sister began research for the 2012 tax organizer. This sister (other POA) lives in our father's house, but had him put in an assisted living home. We got her to sign an agreement to begin paying her own utilities (didn't ask for the past amounts to be returned). She has tried to say that checks written from both the savings and checking accounts have paid back the same money, which isn't possible. She's just sent an email that lists said checks as either paid back, or without receipts to back up for what or why she took the money. Can she just write herself checks from our father's estate without back up documentation?