Bunnymum: I learnt the tips from a colleague who's had experience with maids. I'll verify about the details in their biodata, e.g. how many children. I'll also ask about why they want to work here, their experience, who they have in the family, who they support, what they intend to achieve by coming to work here, etc. I'll also talk in summary about what responsibilities I expect them to take up here, so I hear from themselves what they think about these chores. Cannot trust biodata too much cuz many are filled up by agents. Through these interviews, you will hear about their preferences, e.g. some like working with kids better, some like elderly better. I'll also ask them direct if they are willing to give up on off day.
When my maid arrived, I gave her prep talk on my expectations. Asked her to treat us like her family cuz we will start off treating her as family. Whenever there's an opening chance (E.g. article in papers on murdered maid), we'll take the chance to warn her about things like mixing with Bangla boyfriends.
The old one, just ask the agent to pick her up on the day they deliver the new one. Don't let her know too early you're sending her off incase she play sabotage in your household or attempt to run away. Just tell the agent to inform you when they will arrive... just before agent arrives, tell her to pack and monitor her when she does, and keep her in sight until agent arrives.
Actually Novi is right. Not all transfer maids are bad. Some get transferred because the employer no longer need their service or have other requirements. I had a friend who took over a transfer Indo maid because the previous employer wanted a Filipina who could speak English to her child. Other than the language, the maid was competent in all aspects.