Sometimes library staff will attempt to request an item on behalf of a patron and receive the "invalid password" error message.
The usual cause of this situation is that the patron has updated their password/PIN in the ILS, but ComCat hasn't refreshed this information yet. There has to be a match between the patron's ILS password/PIN and their ComCat password/PIN for any requests placed in their name to go through. The patron should log into ComCat using their barcode and new password/PIN. This will refresh the ComCat data and staff will be able to request on their behalf again.
If the patron does not remember their ILS password/PIN, staff will need to reset it for them.