To enface is described as to write on the front of a check.
When you fill in the blanks on the front of a check, this is an example of enface.
transitive verb-·faced′, -·fac′ing
Brit. to write or print on the face of (a document, check, etc.)
transitive verben·faced, en·fac·ing, en·fac·es
To write on the face of (a check, for example).