The short answer
State the checks, references, first aid and training you hold for every sitter, in specifics, on a page a parent can find in one tap. That is the entire reason a family pays a service rather than asking the neighbour's teenager, and if the site does not say it, you are selling nothing they cannot get for free.
Say what the check is. Say when it was done. Say how many references you take and whether you speak to them. Say what the first aid qualification is and that it is in date. Nothing vaguer than that.
Why a badge is not enough
Almost every babysitting site has a word like vetted, screened or trusted somewhere near the top. Parents have learned that those words mean nothing on their own, because anyone can type them.
What reads as real is process. Application, interview, identity verification, background check, references contacted by phone, training confirmed, and a review cycle. Written in six lines with actual detail, that does more than any badge, because it is the kind of thing a service that does not do it cannot write.
Say the check by its proper name
Background checking for people working with children differs by country and often by state or province, so use the correct name for the regime you operate under rather than a generic phrase.
Two things matter more than the name. First, when it was obtained. A check is a snapshot, and a certificate dated four years ago is not evidence about today. If your country offers an update or continuous monitoring service and you subscribe to it, say so, because that is a materially stronger position. If it does not, say how often you re-check.
Second, do not describe a check as more than it covers. Overstating what a background check proves is both a trust risk and a claims risk. Say what you run, say the date, and stop there.
This is orientation rather than legal advice. Your regulator, and a local adviser, are the authorities on what your service must hold and what you may say about it.
Be precise about first aid
Paediatric first aid is what parents care about. A general workplace certificate is not the same qualification and should not be presented as one.
State the qualification, who awarded it, whether it is paediatric, and that it is current. If not every sitter holds it, say honestly how many do rather than writing a sentence that implies all of them. Parents forgive a partial roster. They do not forgive finding out the claim was loose.
Renewal dates are usually short, so put the training page on a review cycle and treat an expired certificate as an unpublished profile.
References, described honestly
Say how many you take, whether they are from families or from employers, and whether you contact them by phone or accept written ones. If you require a reference from a childcare setting rather than a friend, that is worth saying, because it is a real standard and most services do not hold it.
Do not publish the contents of references or the names of the families who gave them.
Keep the evidence off the public page
State that the check exists and is current. Do not publish scans, photographs or certificate reference numbers, and do not publish sitters' surnames, addresses or personal contact details.
Verification detail belongs in your records. A parent with a genuine need can be shown it at the point of booking, which is also a better moment for it. Publishing it protects nobody and exposes your staff.
Show the training beyond the check
The checks are the floor. What separates services is what comes after: interview questions about safeguarding scenarios, induction, whether sitters have training in recognising and reporting concerns, whether there is a named person they call, and whether new sitters shadow a booking before working alone.
If you have a safeguarding policy, publish it and link it from the vetting page. Parents rarely read it in full. Its presence is the signal.
Put it where the decision is made
The vetting answer should not live only on an about page. It belongs in three places: its own page, a short summary block beside the rates so the number and the reassurance arrive together, and on each sitter profile as a current status line.
A parent who has just seen your hourly rate is at exactly the moment they ask what they are paying for. Answer it there.
Where this sits
Stating checks, references, paediatric first aid and safeguarding accurately, per sitter and in date, is a core part of a babysitting service website as we build it, and the same discipline runs through our other childcare and family websites. Packages are on pricing. Specifics build trust. Adjectives do not.