Writing Tips has been archived and won’t be updated before it is permanently deleted.
For the most up-to-date content, please consult Writing Tips Plus, which combines content from Writing Tips and The Canadian Style. And don’t forget to update your bookmarks!
Both signed at and signed in are correct. However, in legal documents such as contracts, conventions and agreements, the traditional expression signed at is more common.
The prepositions in and at both indicate place or location. However, in emphasizes the idea of being inside or within boundaries, while at expresses exact position, such as a point on a map.
© Public Services and Procurement Canada, 2025
TERMIUM Plus®, the Government of Canada's terminology and linguistic data bank
Writing tools – Writing Tips
A product of the Translation Bureau