There is no single statutory number for resignations in Spain: the notice period comes from your contract or the applicable convenio colectivo, and 15 natural days is the most common default. Check your contract first; leaving with less notice than agreed can let the employer deduct those days from your final settlement (finiquito).
A dated, signed letter delivered on paper (ideally with a stamped copy for you, or via burofax/registered mail if relations are tense) is the safe route in Spain — it fixes the date the notice period starts counting. Email works at many international companies, but ask HR to confirm receipt in writing either way.
No. A resignation letter only needs your decision, your position, the notice you are giving and your last working day. Keeping it short and neutral is standard practice and protects references.
Yes — the letter is assembled in your browser and printed to PDF from here. Nothing is uploaded, no signup, no watermark. Your inputs save locally in this browser only.
Notice orientation for Spain: 15 calendar days — the common default in Spain (many convenios colectivos set 15 natural days for resignations; your contract or convenio may differ). This is orientation, not legal advice: your contract wins.