What the word page is doing here
In this trade a page means one side of paper as issued, and that definition is the whole of the pricing model. A double-sided certificate is two. A folded booklet is counted by its printed faces. A schedule stapled behind a main document counts sheet by sheet. Once you know the rule, you can price the job yourself before anybody quotes a figure at you.
The count is the part you control
The rate does not move, so the only lever is how much paper goes in. Bundles routinely arrive with a passport copy nobody asked for, an old transcript long since superseded, or three sheets of terms printed on the back of a form. Each of those is a side, and each is charged. Pruning the bundle first is the honest saving on this job.
Spanish, and what sits on every side
Whatever the count, each side is rendered in full: headings, tables, footnotes and the small print running along the bottom edge. Seals and signatures are described where they sit rather than turned into sentences. That completeness is why sides rather than words are the unit — the work in a side is far steadier than the amount of text printed on it.
Days, and where the sheets come from
Standard work runs 2–3 business days from a clean scan, and express closes it in 24 hours at a higher rate per side. Where the source is a birth, marriage or death entry, Derby Register Office at Riverside Chambers, Full Street, Derby DE1 3AF issues fresh certified copies. A reissue is often shorter and cleaner than an old photocopy, which quietly lowers the count.