IN POST study plan

Define the core classes of mail (letter, flat, parcel, periodical, marketing, package services) and list the size and weight thresholds that separate them.

Recite the domestic rate categories (First-Class, Priority Mail, Priority Mail Express, USPS Ground Advantage, Media Mail, etc.) and match each to its core eligibility rules.

Identify the key federal statutes and USPS policy sources that govern mail classification and prohibited items.

Build a one-page decision tree that takes an item's dimensions, weight, and content and outputs the correct mail class.

Apply address standards (ZIP+4, delivery point, standardized address formats) to correct malformed addresses.

Classify nonmailable and restricted items and state the handling procedure for each category.

Explain the difference between 'prohibited' and 'restricted' mail and cite the policy basis for each.

Practice using a ZIP code lookup and addressing tools to resolve ambiguous addresses.

Compare the major retail products (stamps, prepaid envelopes, flat-rate options, certified/insured services, money orders) on price logic and customer use case.

Compute postage for mixed-weight and mixed-shape items using current rate charts.

Reconcile a simulated cash drawer: opening balance, sales, money orders, refunds, and closing balance.

Explain the refund, void, and no-sale procedures and when each is permitted.

Role-play a rate-quote interaction in which the customer disputes the price, and resolve it using published rate logic.

Identify the add-on services (tracking, signature, insurance, return receipt) and match them to customer needs.

Explain privacy and disclosure limits on customer information in a retail setting.

Draft a short script for explaining a rate change or service suspension to a frustrated customer.

Trace a mailpiece through the processing flow (collection, culling, cancellation, sorting, dispatch) and name the equipment used at each stage.

Explain the purpose of the ZIP code system and the difference between 5-digit, 9-digit, and carrier-route sorting.

Identify the top safety hazards in a processing or retail environment and the control for each.

Describe the emergency response steps for a suspicious package, a fire, and a medical emergency.

Practice active listening and de-escalation techniques with a customer who is angry about a lost or delayed item.

Write clear, professional internal and customer-facing correspondence using standard formats.

Organize a shift handoff note that captures open customer issues and pending transactions.

Demonstrate accurate data entry and record-keeping for customer complaints and service requests.

Apply the rules for accepting and processing money orders, including limits, identification, and stop-payment requests.

Explain the handling of undeliverable-as-addressed (UAA) mail and the return-to-sender process.

Reconcile a second, more complex cash-drawer scenario that includes voids, refunds, and money-order sales.

Identify the record-retention and audit-trail requirements for retail financial transactions.

Complete a full-length timed practice exam covering all eight domains and score each section.

Review every missed item and write a one-sentence correction for each error.

Re-drill the two lowest-scoring domains with targeted mini-quizzes.

Assemble a one-page personal reference sheet of the most error-prone facts.