2021 P Penny Off Center

Not sure if it is an 'off center - note how Liberty is still within the 'rim', same on the reverse - for the amount of right to left movement, United should be off grid. I think something else is going on here.
A tilted planchet perhaps. On the obverse by the date looks raised and on the reverse (same area - on the right) it looks depressed.

Time for a better expert than me (I'm not an expert lol)

Diameter normal? Thinking the collar missed it mark.Thanks, Doug.

I'm with @john on this one. With some letters falling off the edge on both sides, this one would be a keeper for me.

Looks like its a nice off-center error since its on both sides and missing some lettering of the design, but photo of the edge is helpful - a keeper. Below is some info I've been collecting on these:

Off center - The coin is struck out of the collar and some amount of design elements are missing, either on the obverse or reverse (or both). This should not be confused with a misaligned die error, where one die is out of alignment for the strike and this will be evident only on one side of the coin. An off-center coin does not have to do with the misalignment of the dies. These errors occur when the planchet is, for whatever reason, improperly fed into the striking chamber, and only sits partially on the collar. Since the collar is responsible for holding the planchet in place during striking, only part of the planchet (the part that is over the anvil die) gets struck. The coin is then ejected (providing it is not struck again). An off center strike will show an offsetting of the image on both sides of the coin, and may be misshapen and elongated. Off-center strikes are popular errors and do command a premium based on the percentage off center but generally need to be missing some part of the design to have value (at least to serious collectors). Value for these errors increases if the date is intact as well. The coin interestingly can show cupping (raising on the edge) see: https://www.error-ref.com/cupped-of...nter-strike/

a misaligned die error happens when (usually) the hammer die is not properly lined up with the anvil die, resulting in a slight offset on one side of the coin. This means that only one side will show the misalignment, and the reverse will appear normal.

Partial collar - The coin is struck about half-way or a little more out of the collar and is not really expanded much beyond normal diameter. Collar contact on the edge that is angled as a "tilted partial collar", if horizontal it's a "railroad".. See also: https://www.error-ref.com/partial-collar/

Broadstruck - The coin is struck all the way out of the collar and it is visually expanded beyond normal diameter. All design elements show. A small amount of visual collar contact is OK, as long as the planchet is not in any way really contained by the collar. A coin that is well centered is a "centered broadstrike", or you have an "uncentered broadstrike".