Hi @Rene.titulaer, we inform you that at the time of renewal we will still deduct the cost of the offer from your residual credit, which will therefore go negative, but we will not deduct other renewals. The month of validity of your offer begins when the remaining credit becomes positive, so you don't waste a day. We also remind you that the SIM I have. it is valid for 12 months from the last top-up. Starting from the eleventh month you will only be able to receive calls. To update the expiration date of your SIM you just need to top up. We remain at your disposal for any further clarification.