Spelling error.
Some people mistakenly treat "headquarters" as two separate words, possibly thinking the plural form requires an additional change.
The correct term is "headquarters", which is a singular or mass noun that does not change form in the plural.
People often make this error because "him" is commonly used ... Learn more →
People often make this error because they are trying to ... Learn more →
People often confuse "then" and "than" because they are homophones, ... Learn more →
People often confuse "worst" with "worse" because they are both ... Learn more →