| 401 | Authentication failed | - |
| 401 | Authentication failed | - |
| Status Code | Description | Response Headers |
| 200 | Issuer updated | - |
| 400 | Bad request (e.g., invalid sort key) | - |
| 200 | Issuer updated. Body may contain `validationErrors[]` when business rules failed. | - |
| 400 | Invalid id format, malformed JSON, or identity change rejected for an issuer with scheduled Forms 1099 (TIN, TIN type, or name are immutable in that case). | - |
| 401 | Unauthorized | - |
| 404 | Resource Not Found | - |
| 403 | Caller does not have access to this issuer. | - |
| 404 | Issuer not found. | - |
| Status Code | Description | Response Headers |
| 200 | Issuer updated | - |
| 400 | Bad request (e.g., invalid sort key) | - |
| 200 | Issuer updated. Body may contain `validationErrors[]` when business rules failed. | - |
| 400 | Invalid id format, malformed JSON, or identity change rejected for an issuer with scheduled Forms 1099 (TIN, TIN type, or name are immutable in that case). | - |
| 401 | Unauthorized | - |
| 404 | Resource Not Found | - |
| 403 | Caller does not have access to this issuer. | - |
| 404 | Issuer not found. | - |
| Status Code | Description | Response Headers |
| 200 | Issuer updated | - |
| 400 | Bad request (e.g., invalid sort key) | - |
| 200 | Issuer updated. Body may contain `validationErrors[]` when business rules failed. | - |
| 400 | Invalid id format, malformed JSON, or identity change rejected for an issuer with scheduled Forms 1099 (TIN, TIN type, or name are immutable in that case). | - |
| 401 | Unauthorized | - |
| 404 | Resource Not Found | - |
| 403 | Caller does not have access to this issuer. | - |
| 404 | Issuer not found. | - |
| Status Code | Description | Response Headers |
| 200 | Issuer updated | - |
| 400 | Bad request (e.g., invalid sort key) | - |
| 200 | Issuer updated. Body may contain `validationErrors[]` when business rules failed. | - |
| 400 | Invalid id format, malformed JSON, or identity change rejected for an issuer with scheduled Forms 1099 (TIN, TIN type, or name are immutable in that case). | - |
| 401 | Unauthorized | - |
| 404 | Resource Not Found | - |
| 403 | Caller does not have access to this issuer. | - |
| 404 | Issuer not found. | - |
| Status Code | Description | Response Headers |
| 200 | TIN match result (matched or rejected) | - |
| 400 | Bad request (e.g. invalid field values) | - |
| 401 | Authentication failed | - |
| 429 | Usage limit exceeded (10,000 successful calls per 24 hours) | - |
| 403 | Authorization failed (lack of permissions or product not purchased) | - |
| 503 | IRS Service is not available. Client should retry later. | - |
| Status Code | Description | Response Headers |
| 200 | TIN match result (matched or rejected) | - |
| 400 | Bad request (e.g. invalid field values) | - |
| 401 | Authentication failed | - |
| 429 | Usage limit exceeded (10,000 successful calls per 24 hours) | - |
| 403 | Authorization failed (lack of permissions or product not purchased) | - |
| 503 | IRS Service is not available. Client should retry later. | - |
| Status Code | Description | Response Headers |
| 200 | TIN match result (matched or rejected) | - |
| 400 | Bad request (e.g. invalid field values) | - |
| 401 | Authentication failed | - |
| 429 | Usage limit exceeded (10,000 successful calls per 24 hours) | - |
| 403 | Authorization failed (lack of permissions or product not purchased) | - |
| 503 | IRS Service is not available. Client should retry later. | - |
| Status Code | Description | Response Headers |
| 200 | TIN match result (matched or rejected) | - |
| 400 | Bad request (e.g. invalid field values) | - |
| 401 | Authentication failed | - |
| 429 | Usage limit exceeded (10,000 successful calls per 24 hours) | - |
| 403 | Authorization failed (lack of permissions or product not purchased) | - |
| 503 | IRS Service is not available. Client should retry later. | - |