Military Fieldpost Franking Exemption Era Checker
Find independently verified service/conflict-specific exemption-period records; not automatic free franking. All independently verified matching half-open periods retained; no implied actual entitlement. Caller independently verifies observations, reference edition, units and applicability; not a grading-service certificate, authentication, conservation treatment, actual market price or legal/insurance entitlement.
Description
Fieldpost exemptions can depend on historically defined eligibility periods and context.
Fieldpost exemptions can depend on historically defined eligibility periods and context.1
This checker matches a date to supplied period labels without establishing an exemption or sender eligibility itself.
When to use Military Fieldpost Franking Exemption Era Checker
Use this tool when you need to find every supplied half-open date record covering a query. Prepare independently verified observations, reference edition/context, and matching units or currency basis.
How to use Military Fieldpost Franking Exemption Era Checker and understand its results
- Prepare independently verified observations, reference edition/context, and matching units or currency basis.
- Enter observedDate, callerVerifiedPeriodStarts, callerVerifiedPeriodEnds, callerVerifiedRecordIds, following the field table and calculation rules below, then run the tool.
- Read matchedCallerRecordIds. For result objects, inspect the nested output fields below, including any missing evidence or selected indices.
- Correct any input issues and run again. Before using a successful result, review its units, signs, evidence coverage, and stated model or reference assumptions.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| observedDate | Observed date | string | Required |
| callerVerifiedPeriodStarts | Caller verified period starts | list of string | Required |
| callerVerifiedPeriodEnds | Caller verified period ends | list of string | Required |
| callerVerifiedRecordIds | Caller verified record ids | list of string | Required |
Enter a real YYYY-MM-DD query date and nonempty aligned start dates, end dates, and record labels. Validate every date and require each start strictly before its end. Include every record whose start≤query<end, preserving supplied order and all overlaps. The end date is excluded; no match successfully returns an empty list. Labels need not be unique, and no earliest or latest record wins automatically.
matchingRecords={record_i:start_i≤date<end_i} Read these symbols with the field meanings and branch or reference rules above.
| Output field | Meaning | Value type |
|---|---|---|
| matchedCallerRecordIds | Every record label whose start-inclusive, end-exclusive period contains the query, including overlaps. | list of string |
{
"input": {
"observedDate": "2026-01-02",
"callerVerifiedPeriodStarts": [
"2026-01-01",
"2026-02-01"
],
"callerVerifiedPeriodEnds": [
"2026-02-01",
"2026-03-01"
],
"callerVerifiedRecordIds": [
"a",
"b"
]
},
"output": {
"matchedCallerRecordIds": [
"a"
]
}
}Limitations and assumptions
Historical jurisdiction, service, issue context, and reference applicability are supplied records. A matching date period does not itself establish postal validity, exemption eligibility, or authenticity.
Missing required fields, unknown fields, wrong types, and violated calculation rules return input issues. Arrays must be dense, with no missing cells. Ordinary string lists allow at most 128 strings of at most 128 UTF-16 units each.
Alternative or Complementary methods
For a related task, use Local Post Legality Era Boundary Checker: Local-post boundaries depend on historical periods and independently verified issue context. This checker returns every supplied half-open period label containing the date, keeping overlaps visible. For a complementary step, use Occupation Issue Territory-Year Validity Checker: An occupation issue’s period of applicability depends on independently established historical records. This checker returns supplied record labels covering a query date, without deciding authenticity or postal entitlement.
References
Similar or alternative tools
- Local Post Legality Era Boundary Checker
Local-post boundaries depend on historical periods and independently verified issue context. This checker returns every supplied half-open period label containing the date, keeping overlaps visible.
- Occupation Issue Territory-Year Validity Checker
An occupation issue’s period of applicability depends on independently established historical records. This checker returns supplied record labels covering a query date, without deciding authenticity or postal entitlement.