API · Exit · Banking
Close bank account.
Close a bank account. For Column accounts, calls Column's account-closure API; the closure is synchronous (201 with status: closed). For partner accounts (Mercury / Brex / Chase / Ramp), dispatches a sub-agent to navigate the partner's close-account flow (202 + SubAgentSession; bank_account.closed webhook fires on completion).
Where a partner bank requires a wet signature on a paper form, the actual account closure happens off-Matter — this endpoint records the closure-intent (transitions BankAccount.status to closing), attaches the off-Matter acknowledgement Document when supplied, and on confirmation transitions the account to closed.
Tier-3 token. Required as part of the wind-down sequence after Certificate of Dissolution acceptance; the dissolve cascade does not auto-close bank accounts.
Errors: 400, 401, 404, 409, 429.
Last updated
Query Parameters
dry_runbooleanOptionalIf true, simulate the mutation and return the would-be resource, any cascaded
resources, and a fee estimate — without side effects. Available on every mutation.
Request Body
application/json
TypeScript Definitions
Use the request body type in TypeScript.
reasonstringRequired"dissolution""switching_provider""account_consolidation""fraud""other"effective_datestring<date>Optionalexternal_acknowledgement_document_idstringOptionalPartner-bank closure confirmation, when available. Sets
BankAccount.status to closed. Without it, the
account stays in closing until the acknowledgement
arrives.
final_balance_dispositionstringOptionalHow any remaining balance was disposed of.
null"transferred""escheated""reserved_for_creditors"Response Body
application/json
application/problem+json
application/problem+json
application/problem+json
Request
curl -X POST "https://api.mattermode.com/v1/bank_accounts/{id}/close" \ -H "Content-Type: application/json" \ -d '{ "reason": "dissolution" }'const body = JSON.stringify({ "reason": "dissolution"})fetch("https://api.mattermode.com/v1/bank_accounts/{id}/close", { method: "POST", headers: { "Content-Type": "application/json" }, body})package mainimport ( "fmt" "net/http" "io/ioutil" "strings")func main() { url := "https://api.mattermode.com/v1/bank_accounts/{id}/close" body := strings.NewReader(`{ "reason": "dissolution" }`) req, _ := http.NewRequest("POST", url, body) req.Header.Add("Content-Type", "application/json") res, _ := http.DefaultClient.Do(req) defer res.Body.Close() body, _ := ioutil.ReadAll(res.Body) fmt.Println(res) fmt.Println(string(body))}import requestsheaders = { "Authorization": "Bearer sk_test_4eC39HqLyjWDarjtT1zdp7dc", "Matter-Version": "2026-06-10", "Idempotency-Key": "ee7c3a9b-3f1a-4d8e-9b2a-7c5e1f0a2d4b",}payload = { "reason": "dissolution"}resp = requests.post( "https://api.mattermode.com/v1/bank_accounts/id_placeholder/close", headers=headers, json=payload,)resp.raise_for_status()print(resp.json())import java.net.URI;import java.net.http.HttpClient;import java.net.http.HttpRequest;import java.net.http.HttpResponse;import java.net.http.HttpResponse.BodyHandlers;import java.time.Duration;import java.net.http.HttpRequest.BodyPublishers;var body = BodyPublishers.ofString("""{ "reason": "dissolution"}""");HttpClient client = HttpClient.newBuilder() .connectTimeout(Duration.ofSeconds(10)) .build();HttpRequest.Builder requestBuilder = HttpRequest.newBuilder() .uri(URI.create("https://api.mattermode.com/v1/bank_accounts/{id}/close")) .header("Content-Type", "application/json") .POST(body) .build();try { HttpResponse<String> response = client.send(requestBuilder.build(), BodyHandlers.ofString()); System.out.println("Status code: " + response.statusCode()); System.out.println("Response body: " + response.body());} catch (Exception e) { e.printStackTrace();}using System;using System.Net.Http;using System.Text;var body = new StringContent("""{ "reason": "dissolution"}""", Encoding.UTF8, "application/json");var client = new HttpClient();var response = await client.PostAsync("https://api.mattermode.com/v1/bank_accounts/{id}/close", body);var responseBody = await response.Content.ReadAsStringAsync();curl --request POST 'https://api.mattermode.com/v1/bank_accounts/id_placeholder/close' \ --header 'Authorization: Bearer sk_test_4eC39HqLyjWDarjtT1zdp7dc' \ --header 'Matter-Version: 2026-06-10' \ --header 'Idempotency-Key: ee7c3a9b-3f1a-4d8e-9b2a-7c5e1f0a2d4b' \ --header 'Content-Type: application/json' \ --data '{ "reason": "dissolution"}'const response = await fetch("https://api.mattermode.com/v1/bank_accounts/id_placeholder/close", { method: "POST", headers: { "Authorization": "Bearer sk_test_4eC39HqLyjWDarjtT1zdp7dc", "Matter-Version": "2026-06-10", "Idempotency-Key": "ee7c3a9b-3f1a-4d8e-9b2a-7c5e1f0a2d4b", "Content-Type": "application/json", }, body: JSON.stringify({ "reason": "dissolution" }),});if (!response.ok) { throw new Error(`Matter API ${response.status}: ${await response.text()}`);}const data = await response.json();console.log(data);Response
application/json{
"object": "bank_account",
"id": "string",
"entity_id": "string",
"status": "pending",
"account_type": "checking",
"nickname": "string",
"balance_usd_cents": 0,
"provider": "column",
"account_number": "string",
"routing_number": "string",
"account_number_last_4": "string",
"kyb_decision": "approved",
"kyb_decided_at": "2019-08-24T14:15:22Z",
"column_account_id": "string",
"sub_agent_session_id": "string",
"partner_bank": "column",
"authorized_signer_stakeholder_ids": [
"string"
],
"created_at": "2019-08-24T14:15:22Z",
"activated_at": "2019-08-24T14:15:22Z"
}{
"type": "https://mattermode.com/docs/errors/invalid_request",
"title": "Invalid request",
"status": 400,
"code": "invalid_request",
"detail": "Request body could not be parsed as JSON.",
"doc_url": "https://mattermode.com/docs/guides/errors#invalid_request",
"request_id": "req_Qw9xYz8A"
}{
"type": "https://mattermode.com/docs/errors/not_found",
"title": "Not found",
"status": 404,
"code": "not_found",
"detail": "No entity with id `ent_Nq3KcAbc` is visible to this token.",
"doc_url": "https://mattermode.com/docs/guides/errors#not_found",
"request_id": "req_Qw9xYz8A"
}{
"type": "https://mattermode.com/docs/errors/invalid_state_transition",
"title": "Invalid state transition",
"status": 409,
"code": "invalid_state_transition",
"detail": "Entity ent_Nq3KcAbc is in state `dissolved`; `dissolve` is not a valid transition.",
"doc_url": "https://mattermode.com/docs/guides/errors#invalid_state_transition",
"request_id": "req_Qw9xYz8A",
"current_state": "dissolved",
"attempted_transition": "dissolve",
"allowed_transitions": []
}{
"type": "https://mattermode.com/docs/errors/dissolution_prerequisites_missing",
"title": "Dissolution prerequisites missing",
"status": 409,
"code": "dissolution_prerequisites_missing",
"detail": "Voluntary dissolution requires `board_resolution_id` and `stockholder_consent_id`, or `auto_generate_resolutions: true`.",
"doc_url": "https://mattermode.com/docs/guides/errors#dissolution_prerequisites_missing",
"request_id": "req_Qw9xYz8A"
}{
"type": "https://mattermode.com/docs/errors/valuation_stale",
"title": "409A valuation stale",
"status": 409,
"code": "valuation_stale",
"detail": "Active 409A val_AbCd1234 is older than 12 months or superseded by a material event. Issuing ISOs at the prior strike risks IRC §409A violation. Refresh via POST /entities/{id}/valuations/{id}/refresh_request.",
"doc_url": "https://mattermode.com/docs/guides/errors#valuation_stale",
"request_id": "req_Qw9xYz8A"
}