First of all, I have to ask, which version Tamagotchi are you talking about?
For V3: The password donation levels are 5000, 12000, and 30000. You have to break your donations down into at least three transactions between each level.
For V4: The password donation levels are 20000, 70000, and 200000. You have to break your donations down into at least three transactions between each level.