I've seen them accept 1/2 Lots described by aliquot part and don't think they can void a claim
unless they notify you that there's a problem and give a chance to correct it.
if they don't catch it, they will take your money, not sure if you are protected from over filers or they wont void it if it is sold.
(if something cant be corrected by the previous owner of record because he no longer holds interest in the claim it is void at the time of transfer).
from Handbook H-3830
https://www.blm.gov/sites/blm.gov/files/uploads/Media_Library_BLM_Policy_H 3830_1.pdf
The term “complete lots” comes from the definition of lots in the Manual of Surveying Instructions. This is an excerpt of the appropriate section:
“10·200. Lots, whether those (1) on the north and west boundaries of a township, (2) created by segregation and patenting of lode mining claims, (3) created by meandered bodies of water, or (4) created by other special surveys, are a legal subdivision of official surveys. The subdivision of such lots into smaller legal subdivisions requires an official survey. A location certificate description "W 1/2of lot 1" does not conform and cannot be made to conform to the rectangular or legal subdivisions of the PLSS, and an official survey of the land located and claimed is necessary (Holmes Placer, 29 Pub. Lands Dec. 368 (1899)).”
So, based on the above, this is why if a claim takes in only a portion of a lot, the whole claim must be described by metes and bounds.