1. A method of identifying one or more fillable fields of an electronic form, the system comprising: receiving, by an electronic device, an electronic form, wherein the electronic form comprises an image of a document; identifying, by an electronic device, one or more fillable field candidates of the electronic form; determining, for each fillable field candidate, whether the fillable field candidate is a fillable field; and updating metadata associated with the electronic form by applying, by the electronic device, a sequencing framework to only the fillable fields by: obtaining position information for each fillable field, wherein the position information indicates a position of the fillable field on the document as displayed via a display device, sorting the fillable fields based on the position information to form a sequence of fillable fields, determining a designator to each fillable field, wherein the designator indicates a position of a corresponding fillable field in the sequence, and storing the designator in a data store such that it is associated with the corresponding fillable field.