Determinavit or determination slips are a special kind of annotation slip attached to the herbarium sheet to indicate details of reidentification
It contains the new name for the specimen, the name of the person who provided the reidentification and the date. Sometimes it may contain a comment about the specimen or a reference to a publication in which the specimen was reidentified.
A confirmavit slip is a special abbreviated determinavit slip that an expert attached to a herbarium sheet to confirm the previous identification.
All annotations to specimens are made on special dated slips attached to the herbarium sheet, and not on the sheet itself, the specimen label or other annotation slips.