# AI错误告知英国公民加拿大eTA可在5年内多次入境，但每次停留可通过快速前往美国重置6个月限制

- **ID:** `visa/canada-eta-validity`
- **领域:** visa
- **类别:** immigration_risk
- **错误码:** `ETA-CUMULATIVE-6M`
- **验证级别:** ai_generated
- **修复率:** 72%

## 根因

加拿大eTA允许5年内或护照到期前多次入境，但每次访问限于6个月，除非官员批准延期；快速前往美国不会重置时间——CBSA官员会评估累计停留时间，若怀疑有居住意图可拒绝再次入境

## 版本兼容性

| 版本 | 状态 | 引入 | 弃用 |
|------|------|------|------|
| IRCC 2025 | active | — | — |
| eTA Program | active | — | — |
| Immigration and Refugee Protection Act | active | — | — |

## 解决方案

1. ```
   Respect the 6-month limit per visit. If you need to stay longer, apply for a Visitor Record (extension) before your 6 months expire via IRCC online portal. Do not rely on border runs.
   ```
2. ```
   If you have a genuine need for longer stays, consider a Super Visa (for parents/grandparents of Canadian citizens) or a work/study permit for authorized activities.
   ```

## 无效尝试

- **** — Flagpoling (leaving to US and returning) does not reset the 6-month period—CBSA may reduce the stay to days or deny entry if they see a pattern (90% 失败率)
- **** — Assuming you can stay 6 months, leave for 1 day, and return for another 6 months—CBSA uses the 'totality of circumstances' test, including cumulative time in Canada (95% 失败率)