A few British government bonds are undated2undated cheque/document an undated cheque etc has no date written on it.

What is the meaning of undated cheque?

An undated document has no date on it: The cheque/letter was undated.

Can I cash an undated check?

Cashing an Undated Check

Since banks follow the UCC, your undated check will be deposited. ... If you have access to the person who wrote the check, you can always return to that person and ask that the date be written in. If not, a blank date line is better than altering the check by sliding that date in there yourself.