How to urge rent

First of all, this kind of thing cannot be euphemistic. You are not related to her by blood. What's the mutual affection Make it clear that you will leave if you don't pay on time.

Send a text message first

Hello, Miss * *, I'm Miss * *, the landlord. Please transfer this month's rent to the previously agreed account. If in doubt, please call for it. Please reply. Thank you.

Call if you don't reply

If you just transferred the ownership, it is possible that the rent will still be paid to the former owner, because the rent will be paid to the original owner before the full amount is received, but the bank may not lend the money to the original owner.