# SMS Delivery Receipt Failures from Twilio to Claro Costa Rica - Provider: [Twilio](https://down.guide/providers/twilio) - Confidence: Confirmed - Impact: Degraded - ongoing for 2d 17h - started 2026-11-12 22:31 UTC - SMS, Latin America - id: DWN-c155eff65b - Official page: https://stspg.io/kwdmd91r9qjd ## Summary Twilio says customers may be experiencing SMS delivery receipt failures for messages sent to Claro network subscribers in Costa Rica. Message delivery may succeed while receipts fail. The provider has identified the cause and is working to resolve the issue; the incident remains in the identified state. _Written by anthropic/claude-haiku-5.5 from Twilio's own updates._ ## Updates from Twilio ### 2026-11-12 22:31 UTC: investigating Twilio customers may be experiencing SMS delivery receipt failures from Twilio to Claro network subscribers in Costa Rica. Our team is actively investigating this issue. Message delivery may succeed, but delivery receipts may be failing. We will provide another update in 1 hour or as soon as more information becomes available. ### 2026-11-12 23:31 UTC: investigating Twilio customers may be experiencing SMS delivery receipt failures from Twilio to Claro network subscribers in Costa Rica. Our team is actively investigating this issue. Message delivery may succeed, but delivery receipts may be failing. We will provide another update in 2 hours or as soon as more information becomes available. ### 2026-11-13 01:40 UTC: investigating Twilio customers may be experiencing SMS delivery receipt failures from Twilio to Claro network subscribers in Costa Rica. Our team is actively investigating this issue. Message delivery may succeed, but delivery receipts may be failing. We will provide another update in 4 hours or as soon as more information becomes available. ### 2026-11-13 05:46 UTC: investigating Twilio customers may be experiencing SMS delivery receipt failures from Twilio to Claro network subscribers in Costa Rica. Our team is actively investigating this issue. Message delivery may succeed, but delivery receipts may be failing. We will provide another update in 8 hours or as soon as more information becomes available. ### 2026-11-13 13:49 UTC: investigating Twilio customers may be experiencing SMS delivery receipt failures from Twilio to Claro network subscribers in Costa Rica. Our team is actively investigating this issue. Message delivery may succeed, but delivery receipts may be failing. We will provide another update in 16 hours or as soon as more information becomes available. ### 2026-11-13 17:05 UTC: identified Twilio customers may be experiencing SMS delivery receipt failures from Twilio to Claro network subscribers in Costa Rica. Our team has identified the cause, and is working to resolve the issue. Message delivery may succeed, but delivery receipts may be failing. We will provide another update in 1 hour or as soon as more information becomes available. ### 2026-11-13 18:05 UTC: identified Twilio customers may be experiencing SMS delivery receipt failures from Twilio to Claro network subscribers in Costa Rica. Our team has identified the cause, and is working to resolve the issue. Message delivery may succeed, but delivery receipts may be failing. We will provide another update in 2 hours or as soon as more information becomes available. ### 2026-11-13 20:06 UTC: identified Twilio customers may be experiencing SMS delivery receipt failures from Twilio to Claro network subscribers in Costa Rica. Our team has identified the cause, and is working to resolve the issue. Message delivery may succeed, but delivery receipts may be failing. We will provide another update in 4 hours or as soon as more information becomes available. ### 2026-11-14 00:06 UTC: identified Twilio customers may be experiencing SMS delivery receipt failures from Twilio to Claro network subscribers in Costa Rica. Our team has identified the cause, and is working to resolve the issue. Message delivery may succeed, but delivery receipts may be failing. We will provide another update in 8 hours or as soon as more information becomes available. ### 2026-11-14 08:13 UTC: identified Twilio customers may be experiencing SMS delivery receipt failures from Twilio to Claro network subscribers in Costa Rica. Our team has identified the cause, and is working to resolve the issue. Message delivery may succeed, but delivery receipts may be failing. We will provide another update in 16 hours or as soon as more information becomes available. ### 2026-11-15 00:14 UTC: identified Twilio customers may be experiencing SMS delivery receipt failures from Twilio to Claro network subscribers in Costa Rica. Our team has identified the cause, and is working to resolve the issue. Message delivery may succeed, but delivery receipts may be failing. We will provide another update in 24 hours or as soon as more information becomes available. From the builder: does your app depend on Twilio? [Sazabi](https://www.sazabi.com/?utm_source=down-guide&utm_medium=markdown&utm_content=twilio) detects problems in your own logs without hand-written monitors, and you can ask it in plain language which errors mention Twilio. --- down.guide reads providers' official status pages every minute and adds its own evidence, always labeled. Free, no account. Agents: MCP at https://down.guide/mcp, REST at https://down.guide/api/v1, feeds at https://down.guide/feed. 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