Marking Your Golf Ball: How and When

When do you have to mark your ball?

You must mark your ball before lifting it whenever:

• You're on the putting green — you're entitled to lift and clean your ball on the green at any time, but you must mark it first.
• Your ball interferes with another player's play — if asked, you must mark and lift.
• You're taking relief — in most relief situations, you mark the original spot, lift the ball, and proceed from there.
• You want to identify it — you may lift a ball to check if it's yours, but you must announce it first and mark the spot.

In other situations (fairway, rough, bunker) you generally play the ball as it lies without lifting — so marking isn't required unless you're taking specific relief.

How to mark correctly

Place the marker directly behind the ball — the side furthest from the hole. The marker goes on the ground, touching or immediately behind the ball's rearmost point.

Then lift the ball. Remove it cleanly — don't drag it across the marker or nearby grass.

To replace it: place the ball back in front of the marker, then remove the marker.

The most common objects used to mark a ball:

• A coin (the classic, and perfectly legal)
• A manufactured ball marker (the flat disc you find in many golf bags and gloves)
• A tee peg pushed into the ground

You cannot use something that could advantage you (like a large object that you can use to align your putt differently). Standard coins and markers are fine.

Moving the marker to get it out of another player's line

If your marker is on another player's putting line, you'll often be asked to move it. The procedure:

1. Use your putter or a club to measure one or more clubhead-lengths to the side.
2. Note a reference point in line with your marker and the hole (e.g., a discolouration in the grass, a blade, a fixed object).
3. Move the marker that distance to the side.
4. When replacing your ball, reverse the process — move the marker back before placing the ball.

You can move it as many clubhead-lengths as needed. The important thing is to always return it to exactly the original position.

If you forget to move it back and putt from the wrong spot, it's a 2-stroke penalty in strokeplay (or loss of hole in match play) for playing from a wrong place.

Marking your ball to identify it (anywhere on the course)

You're allowed to lift a ball to identify it even when not on the green — if you genuinely can't tell whether it's yours without lifting. The procedure:

1. Announce to a playing partner (don't just do it alone).
2. Mark the spot.
3. Lift only enough to see the identification mark. Don't clean it beyond what's needed to identify it.
4. Replace it in the exact same spot and position.

If you clean it more than necessary to identify it, it's a 1-stroke penalty.

Ball identification — why it matters

The "wrong ball" rule is one of the most penalised rules in golf, and most wrong-ball situations happen because players didn't clearly identify their ball before a round.

Before you tee off:

• Check the brand, model, and number on your ball.
• Add a personal mark — a dot, line, or initials with a permanent marker. This is the surest way to identify your ball instantly.

Two players using the same model and number ball with no personal mark is asking for trouble.

What happens if you don't mark before lifting?

If you lift your ball without marking it (in a situation where marking is required), it's a 1-stroke penalty, and you must replace the ball.

Exception: if your fellow competitor or caddie lifts your ball without your instruction, there's no penalty to you — the penalty goes to the person who lifted it. If they do it with your authorisation (e.g., you asked them to mark and lift), the normal rules apply.

Frequently asked questions

Can I mark my ball with a tee? Yes — a tee peg pushed into the ground is a valid ball marker. Make sure it's positioned consistently (same side, same angle) so you can replace the ball accurately.

Can I clean my ball after marking it? On the putting green: yes, you can clean it fully. Elsewhere: only if you're taking relief or identifying the ball — and then only as much as necessary.

What if my marker moves (wind, footstep)? If the marker moves by itself (wind, someone accidentally stepping on it), there's no penalty. Replace it as close as possible to its original position.

Do I have to use a coin — can I use anything? You can use any small object that isn't likely to give you an advantage (improve your alignment, etc.). Standard coins, ball markers, and tees are all fine.