Is texting past customers legal?
With consent, yes, and an existing customer relationship usually provides it. We check consent, put an opt-out on the first message, send inside legal hours, and keep the record. Where consent is unclear, that segment does not get texted.
What if my list is a mess?
That is normal. A spreadsheet, an invoicing export and a phone contacts list are enough to start. Cleaning it is part of the work.
Will it annoy people?
Not if the reason is real and the ask is small. One message, a genuine seasonal reason, an easy opt-out. The complaints come from monthly blasts with nothing to say.
Does this work for a one-off service?
Yes, but as a referral campaign rather than a repeat-purchase one. Someone who cleared a garage last spring is not buying again soon — they do know three neighbours who should.
What does it cost?
A fixed-price campaign sprint plus messaging costs. Usually the fastest-returning thing in the first sprint.