checked to vs checking to

Some examples from the web:

• The label on the pen should be checked to make sure it contains the correct insulin.
• If disposable filter cartridges are used each lot must be checked to confirm that it does not release soluble organic carbon.
• We need to take it seriously when framing EU legislation, so that in future every new directive is checked to see whether it conflicts with the Lisbon objectives or promotes them.
• the evidence is checked to determine that it is valid according to an authoritative source;
• On receipt samples should be checked to ensure that any packaging has not been damaged and that the sample is in good frozen condition (if frozen).
• Whilst the registration process has been introduced differently across the Member States, at times with offline or manual steps in the verification process, Member States should ensure that the identification details can be effectively checked to facilitate the completion of the registration process.
• The label on the pen should be checked to make sure it contains the correct insulin.
• The interval during which the mouse pointer position will be checked to determine whether or not it is at the same edge of the screen as the window.
• The issue of using the IMEI numbers is clearly a first step, in that bulk transactions of mobile phones should only be authorised if the IMEI numbers are checked to make sure those phones have not already been subject to a previous fraudulent transaction.
• the evidence is checked to determine that it is genuine; or, according to an authoritative source, it is known to exist and relates to a real person
• SSR codes assigned to aircraft being transferred from air navigation service providers in neighbouring States shall be checked to see if the assignments can be retained in compliance with a code allocation list agreed by Member States and coordinated with European third countries;
• the evidence is checked to determine whether it is genuine, or known to exist according to an authoritative source, where the inclusion of the legal person in the authoritative source is required for the legal person to operate within its sector
• Labelling must be accurate and checked to ensure consumer confidence.
• It's in your interest to keep this option checked to avoid modifying your original image.
• They never checked to see if it was unlocked.
• I even checked to see if the fire alarm could create a useful distraction.
• And I checked to make sure James' snorkel was working.
• So I checked to see who lived there.
• All applications will be checked to assess whether they meet the formal criteria of eligibility.
• I checked to make sure Dan was still at work.

Some examples from the web:

• I was checking to see if my phone was working.
• She is checking to see if she can trust someone.
• Monitoring is the process of checking to ensure:
• Like checking to see if the writer's upset.
• I was checking to see if blair changed her number.
• Must be checking to see if water can come through.
• Must be checking to see if water can come through.
• I'm checking to see how many of them were stolen recently.
• I... was checking to see if Michael was done with his call.
• Henry's checking to see if there's a match on CODIS.
• You should be checking to see if it's long enough for Ricky berkowitz.
• I was checking to see if David was still with the Playboys.
• Big guy's checking to see if anything got caught on surveillance videos.
• We're checking to see if anyone has researched poisonous mushrooms.
• I'm checking to see if you love me.
• I was checking to see she wasn't in trouble.
• He's definitely checking to see whether I'm shocked now.
• I'm checking to see who's here.
• He's checking to see if you're still human.
• I'm checking to see if you need to be tweezed.